Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3c254af0986741…

MALICIOUS

PDF

149.5 KB Created: 2021-07-21 15:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 88d89cd001ba3ad48d71adb302e5ba3d SHA-1: a7c118f54095f0fd69458fa9e3c2ad8df0a5ecfa SHA-256: ea3c254af0986741d3a336f6b99b41384f5d8782e6359a627d079f4071349531
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL findings point to a common tactic of using compromised sites to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/3eda561ec75c8a21cb9e9af731392175/48976097829.pdf In PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766d5befe26---sopabajug.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210615235030.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608654d62dd37---88806829943.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b7c49b24---tenimexudewurunil.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608235a81d861---ribojumasuzezegol.pdfIn PDF document text
    • http://coinmarketsuite.com/ckfinder/userfiles/files/79421013421.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/11832290405.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/29299158007.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/42457240926.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f4db8b946---jijugomekur.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d39732d2d5---963721437.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/c7gio830ek71o2nqaf36eer953/65224956058.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/21b3aed674cb058b47b4e21d8dc76d0b/gofoneruxonul.pdfIn PDF document text
    • http://njnccualumni.com/clients/0/05/05b55d2c4c342460da0dc2f503861b12/File/wevubefuwuvoferapulabata.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/37365469895.pdfIn PDF document text
    • https://businesslife.com/content/file/jagomirobejadawewolumesik.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/nulirinurijinezeru.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/36185138391.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/d0pgurpqdp33vgsgj01ggorvd3/2100630043.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de13e45ede5---76760031358.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/30084971aba6fe7964fd217cbbd873eb/xajuvije.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/gewinini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=female+japanese+metal+bandsPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E9A4 10488 bytes
SHA-256: 578d452a2c70b4472ef58dbf4f3a162ce2c913c0121712150d14411e8f45864b
font_01_sfnt_off00020143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21955 18008 bytes
SHA-256: 9ac3e0759263cc4e5dd3ef27e473357590198557d9056276ac81c242f4717a69

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