Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2f9caa46e41b1d…

MALICIOUS

PDF

73.5 KB Created: 2021-02-13 21:55:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 660425460c68c9a01842c616fd3163bb SHA-1: 08664c4769af709ddcb5128f8e826ba1f1ab2551 SHA-256: 3b2f9caa46e41b1df6c132eec75f23cb4a332ab0120742918754f61f9977714b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely attempting to redirect users to fraudulent websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=buy+hack+western+union+transfer PDF link annotation
    • http://padlamadla.site/nezonolazobobaggpr1k.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/lofunetoma.pdfIn PDF document text
    • http://ehaberdevlet.com/653008635165fcm8.pdfIn PDF document text
    • http://dkblogin-de.best/37599888079nwddb.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/22f0e97197.pdfIn PDF document text
    • http://help-ruleviolation.com/audio_visual_aids_in_teaching_englishlkpyc.pdfIn PDF document text
    • https://bigonokefexix.weebly.com/uploads/1/3/4/5/134518339/bemofitixuw.pdfIn PDF document text
    • http://karnaval.host/tinkers_construct_2_modifiers73k1f.pdfIn PDF document text
    • http://yewes.fun/buxafozigipirewun7g0yl.pdfIn PDF document text
    • http://bazis-rostov.com/12448833783vx8g8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/ubuntu_install_android_emulator_command_line.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off0000c6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E6 5244 bytes
SHA-256: 2b831b7dab6f4a1663a2eb3e5050804d57893cefa15e4b87dc7da7977cdc1e92
font_01_sfnt_off0000d8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 11620 bytes
SHA-256: fa5ed77558cbd460f46ff3c173809d1df2f54f16dbb1ccf9aed24ec4bbc9161a
font_02_sfnt_off0000f568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF568 9812 bytes
SHA-256: 1460428f4709b466460fdbcb6a23806ffddbda924c1a97f2253de77fa6f369a6

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