Malicious PDF — malware analysis report

Static analysis result for SHA-256 db34e1f6fd24af88…

MALICIOUS

PDF

89.2 KB Created: 2021-03-04 18:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5654ff46b1ad176e3d9440817428334f SHA-1: 12774484d258f57fb8f52daa5e5b18bae5bda4d9 SHA-256: db34e1f6fd24af886efbea280f39bb907bbc20a961d6a5c4e53b94debfbd7b1e
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/award?keyword=sat+prep+book+2019+reviews PDF link annotation
    • https://cdn.sqhk.co/vitikitema/hieHkih/study_tips_for_middle_and_high_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/zogowefu/2xHMjem/wordscapes_level_8240.pdfIn PDF document text
    • https://cdn.sqhk.co/mugapowejog/cShcyDK/kaz_trickshot_map_code_4._0.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/wavebevusi.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/garuvevewudemugasizovub.pdfIn PDF document text
    • https://woseluwimi.weebly.com/uploads/1/3/4/1/134131525/retupibidezabajijim.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/3801250.pdfIn PDF document text
    • https://vabemeraronoj.weebly.com/uploads/1/3/1/4/131452983/2188120.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/ggNgegc/nobiroligodim.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/tjcjije/red_rose_pizza_college_hill.pdfIn PDF document text
    • http://nowuxik.iblogger.org/72050964009.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/84767573288.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/rowdy_baby_video_song_tamil_hd.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_38d79222ea0b4d31b034149842f26935.pdf?index=trueIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_e88b691b26c3414fbdf45209f703537a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/solving_linear_inequalities_in_two_variables_calculator.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/snare_drum_practice_pad_with_snare_sound.pdfIn PDF document text
    • http://tufopabapud.rf.gd/79674564086.pdfIn PDF document text
    • http://davagutuvis.rf.gd/junji_ito_collection_anime_review.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001204d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204D 5724 bytes
SHA-256: b607aeaae35d3ea9fbf1c6a11c32a6d48d5f2de099f22c84b43affd07d13f3f0
font_01_sfnt_off000133ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EA 10520 bytes
SHA-256: 43374555252340ce5f3865f6792549920a10225f8c4ebb00fa4e739b33b19b9b

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