Malicious PDF — malware analysis report

Static analysis result for SHA-256 de790edf1f5f61fd…

MALICIOUS

PDF

73.9 KB Created: 2021-02-22 03:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5ec5951d5b38082ef46c32e8294d472f SHA-1: 99f2d1486dbd7e2020d4f91d357d8572145c8273 SHA-256: de790edf1f5f61fd43b268b709aac153889118eeb44460a752794596b4add19d
126 Risk Score

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 0.9998

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://maypoin.ru/wix?keyword=wolf+german+shepherd+puppies+for+sale+in+california PDF link annotation
    • http://reduslim-shop.website/stickman_dismount_ragdoll_mod_apkfiqx1.pdfIn PDF document text
    • http://alisaborodaenko.design/zuzinokogmq0z1.pdfIn PDF document text
    • http://geekcods.com/spongebob_laughing_meme_template86zlx.pdfIn PDF document text
    • https://cdn.sqhk.co/wavagowew/gYhajjX/65056700859.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/gd0sl7L/sniper_zombie_apkpure.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/0j6OAjh/42316910472.pdfIn PDF document text
    • http://wisecredit.info/ruxojexbgql.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/4gd8jdm/nick_soccer_stars_codes.pdfIn PDF document text
    • http://wide-do.top/shallow_cello_sheet_music_freegagq6.pdfIn PDF document text
    • http://rubisteq.online/slither._io_unblocked_games_669p1z4.pdfIn PDF document text
    • http://uscarinsurance.info/8th_grade_algebra_equations_with_answerscdy1c.pdfIn PDF document text
    • https://cdn.sqhk.co/voxoduvi/igRiahd/24295101739.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/d6qAzny/wanogo.pdfIn PDF document text
    • http://avlto.best/lenavupobigavobolemozose7l02i.pdfIn PDF document text
    • https://cdn.sqhk.co/goganededem/cKLtMji/gravity_blanket_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/bizifabov/JjdEij7/47814856176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 5

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_off0000e3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CF 5580 bytes
SHA-256: b628b74af237c91760e91c46459183d0dd550764802867b21765acade6b0e016
font_01_sfnt_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 10308 bytes
SHA-256: 797536752350bfc3a40d772873e0e30b68548001c8d7646bb742cc702df1c2fa

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