Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead11ce7af2e280d…

MALICIOUS

PDF

187.2 KB Created: 2021-08-16 01:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d816ac80c89889ee741bb341090786ad SHA-1: aa863b62beed794a2f6f494f35f808ac12329f67 SHA-256: ead11ce7af2e280d502975a13a4b462d2acb0a34548dead24a40b72c4e0652f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the presence of a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. While no scripts were explicitly extracted, the nature of the link farm suggests an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9031

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://camonetinternational.com/files/file/fotobavinexuvojerav.pdf In PDF document text
    • http://prmakeup.com/Image/files/4632261183.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6104d950---texorusu.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc1a125272---18622289147.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/butapijivelubire.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/17772185408.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4727e8f4---rotisaronumoxokovafeme.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610691507f018---xoviweleregaxuro.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160906a2f81d54---rijiniluveba.pdfIn PDF document text
    • http://wych123.com/upload/files/murewofazufo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fba23431d3---popojirulezafufo.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c32929cf0cf95cae3aa5e7acc12f9745/webixokamijibibuto.pdfIn PDF document text
    • http://toicodonlyson.com/uploads/files/80631968939.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/4eaa26b571c3342ecf0a46d39bd4ba73/53852075214.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/5811bf94d800d96c69c07b3466694ce8/nuzivezolorasixafajonozo.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/wabole.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/s2md9qub4n41hhl45va3rft78q/firezogadanulobijutox.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/21054660082.pdfIn PDF document text
    • http://jl-vacuum.com/upload/files/vajirasigotaboxegigi.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2ea3790ec---fasobomam.pdfIn PDF document text
    • https://digbijoynath.in/iisc/ckfinder/uploads/userfiles/files/62487472276.pdfIn PDF document text
    • http://nfc.soo.jp/file/82294626360.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc8b08e4f27---selisagon.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/45234934681.pdfIn PDF document text
    • http://abpaluso.com/upload/file/46613468180.pdfIn PDF document text
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/37322725972.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=doraemon+videos+in+telugu+new+episodes+2019PDF 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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F2A6 28048 bytes
SHA-256: b2673a50ad62a19497fb1eef2d25d8f271e319174ff6c64aa5f1f7455bb95d0a
font_02_sfnt_off00022f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F54 54516 bytes
SHA-256: ae595ccb30edde4e3bf87e680e2787e456dd909ef1e52e4dc94f73f2eba2e883
font_03_sfnt_off0002c325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C325 11448 bytes
SHA-256: ccc51fa1f780271c5bd2572fbeefbbc5011ca1d687123e154bc2c3b6fdd3f988

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