Malicious PDF — malware analysis report

Static analysis result for SHA-256 1932cbe24a7f0212…

MALICIOUS

PDF

87.1 KB Created: 2021-02-22 23:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 102a12e024bf31556360154525e6a2bb SHA-1: 62ef285b27d7b89fcaa3eeb2688f871dcd9ace79 SHA-256: 1932cbe24a7f02121bb6cdc3841d096cc1db2f16d17d9c23e7391e84adf937d8
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The embedded content, though heavily obfuscated, appears to be a lure related to a technical query. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the linked URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wb?keyword=how%20to%20remove%20hose%20from%20hoover%20carpet%20cleaner PDF link annotation
    • https://xozejobe.weebly.com/uploads/1/3/1/4/131406614/wetafu.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/fudip-vevobowaf-nanokinaritoza.pdfIn PDF document text
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/jiniragaromenab_tugarela.pdfIn PDF document text
    • https://mijezuri.weebly.com/uploads/1/3/0/9/130969422/8e57e9a915dc.pdfIn PDF document text
    • https://lagonola.weebly.com/uploads/1/3/4/8/134851586/ce81f7.pdfIn PDF document text
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/545830.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477409/normal_6016512b6ec0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369933/normal_6012335f7c67b.pdfIn PDF document text
    • http://xafukuxovikovu.22web.org/citation_sample_apa_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wuxojawe.epizy.com/antipsychotics_and_pregnancy_guidelines.pdfIn PDF document text
    • http://bivoxubi.epizy.com/40925729748.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/mystery_of_love_flute_sheet_music.pdfIn PDF document text
    • http://xomedejufe.rf.gd/mixeredesusapiref.pdfIn PDF document text
    • http://pedefulavok.rf.gd/lucina_guide_smash.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/75378770627.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/video_converter_to_avi_apk.pdfIn PDF document text
    • http://dukedofabi.epizy.com/zezidazodugawuluraj.pdfIn PDF document text
    • http://mubadel.epizy.com/97020627868.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A57 5108 bytes
SHA-256: c6eb0cf51240d2deb5268161f0ef13352cadeac9f494e1c381bc138bcca80787
font_01_sfnt_off00011b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 10820 bytes
SHA-256: 47cfeccd1a65c57c70e9b3b6cf9399e6a44806ad2ef2dbe5275c5aecc2226991
font_02_sfnt_off0001405a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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