Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b9dcf1c597ec42…

MALICIOUS

PDF

76.5 KB Created: 2021-05-04 08:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 401ea60e01031ae6ca77fe9703497920 SHA-1: de0ababf1d81869b467aaa26a90dd6edb25bef5e SHA-256: 38b9dcf1c597ec42ac26520979822c9fcf658e73dfb7e93b3fdcfe7bc484abc0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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://kuzutuzo.ru/strik?utm_term=what+is+the+conflict+in+a+plot+diagram PDF link annotation
    • https://cdn.sqhk.co/janezewufaj/dlhcwgj/zigukivobi.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/fmzvnL7/kingdom_chronicles_2._free_strategy_games.pdfIn PDF document text
    • http://cocobeautybar.ca/vitalina_wilson_fresno_ca0bzfx.pdfIn PDF document text
    • http://bathforlegs.xyz/r_programming_jobs_for_freshers_in_chennai1m98p.pdfIn PDF document text
    • http://5coupons.info/564151644542fu7q.pdfIn PDF document text
    • http://tupujetu.sportsontheweb.net/calcium_oxalate_kidney_stone_diet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_606ea6ede29d2.pdfIn PDF document text
    • http://edarudost.online/elevation_worship_do_it_again_chordsj3p0a.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/61664991572.pdfIn PDF document text
    • http://armada.technology/free_amharic_islamic_booksi8fx5.pdfIn PDF document text
    • http://idslim-italia.site/fopozudiwomufajiruzovupakgls1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408340/normal_5fe3df03d8f1d.pdfIn PDF document text
    • https://cdn.sqhk.co/xokebuzizo/hngjhc4/tmnt_leo_and_tigerclaw_fanfiction.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/4fpJTbp/bamivajirekobuxaditemesam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479923/normal_5ff9f6eabc473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_602c56f51a44e.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/discovery_of_witches_season_2_episode_3_air_date.pdfIn PDF document text
    • http://netezasodi.22web.org/zonujovabenimamagixu.pdfIn PDF document text
    • http://salea.site/xupudexedipodioqnco.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481662/normal_5fe496adcbe87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagizub.rf.gd/27876869449.pdfIn PDF document text
    • http://pafomotaxo.epizy.com/75534134391.pdfIn PDF document text
    • http://sazojojuw.rf.gd/40213170696.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 5580 bytes
SHA-256: 25e214e12cc76d0b6ca15f2aad9575cc2da936c42260c72975dae0511f1cacb7
font_01_sfnt_off00010106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10106 10420 bytes
SHA-256: d5a5083dd55fc71cebace34a4b5940d2fcba554508bccde0258e4da3d5c36283

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