Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4d2c1a95cbe0210…

MALICIOUS

PDF

144.2 KB Created: 2021-07-07 01:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e218a8da470fe96dbf8783d50f75a40f SHA-1: 0d68ff4e12fd2bef591c852b937ef8e35a066c5c SHA-256: a4d2c1a95cbe021061b5dab4800c962730550cc66b4295d14740fc7703eb3056
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing or credential harvesting attack. The document employs a critical lure to solicit recovery secrets or private keys, and a high-severity lure instructing users to copy/paste content into command-line interfaces, likely to execute malicious commands or download further payloads. The presence of numerous links to potentially compromised or disposable hosting sites further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://accounting789.com/ThImg/file/55810981879.pdf In PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bsstmf44ho3i9csc9s00b78fi1/deniguzi.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc503c4796---56085341567.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/82f73d52370b0ad75ed9dd11bf5dd89e/67993746187.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/4031398478.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/46316071534.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f94adeb73---kejidodijojimu.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/xepaxudezivolojuki.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4618722b8ac0e0d698c8ed7577a3d541/28153594091.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/j5c9qv3f7mgj1lnn4qguem3mo2/genegisuxizopisu.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/fofekedogonagi.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/rogewuxerulegik.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/rqieee3o4mqdhtjoloih73def2/gegozaxosaxidulamumor.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aac375037e---bojawelivonepotujirumara.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/zujate.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a86433642---lezalasewaxuroje.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/37605637645.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3625431698---sajonenuwiguridid.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/vawexaviruweweragewa.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/40880825b4b3a17316c980923b6b8130/papaxuko.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/kusiwi.pdfIn PDF document text
    • https://coevent.ru/upload/files/84117965192.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e2580a9b79d---zimorutebobalomapeva.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16088e36453a17---zuzat.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/34384313576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=windows+server+2008+questions+and+answers+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001bbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBE5 17324 bytes
SHA-256: e0aa633336cac31e1c4168d4f87dc46ba11999b451c880f0d419a54956fcf6f4
font_01_sfnt_off0001e992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E992 11284 bytes
SHA-256: d8b01d6d17a9c76d030d07b5986ec3e84ceebe01999c9dcbe365b9681537a3b3
font_02_sfnt_off00020418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20418 16308 bytes
SHA-256: 0fa97fbaccd6e3681d7a19e709012d4dbcbe00a5837ddc3450c256f2421cca28
font_03_sfnt_off00021a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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