Malicious PDF — malware analysis report

Static analysis result for SHA-256 b066807fa46c2631…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 20:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5ddbdb333d8c2c6e5e145e4bcceeaaf1 SHA-1: d784ef038888e29cc404d9ac1e0372951ae58a3b SHA-256: b066807fa46c26311436f6995a2ca83f2862bab222c239bbcb5a1bd62b01bc0e
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=4e+barbarian+guide PDF link annotation
    • http://jumufedug.22web.org/ccna_200_125_sybex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_6011048850013.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/7i4biaT/shellac_nails_done_at_home_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/ggBkiiM/xijosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_5fe6b42bda302.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/hgjadOa/fonts_keyboard_text_fonts_emoji.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jx9thjj/wormax._io_mod_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/raxavetaletu/jdTBjj3/cracked_screen_prank_iphone_11.pdfIn PDF document text
    • https://cdn.sqhk.co/kezulegol/csiOidi/pluralist_approach_to_industrial_relations.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/pEN7jjE/cbs_sports_fantasy_baseball_podcast_email.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5ff93221168a0.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/acting_scripts.pdfIn PDF document text
    • http://vamonaxegijugi.22web.org/lol_jarvan_guide_german.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/n2Xjghi/90994506672.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/agcifgh/harvest_market_champaign_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/opbihwd/fagibusamiru.pdfIn PDF document text
    • http://rotawafuwuno.scienceontheweb.net/66208887162.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/TjbHqus/zeleporuxafapifodegewe.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/zitexaz.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/zih5dsy/53800670856.pdfIn PDF document text
    • https://cdn.sqhk.co/jifedibodo/geigTie/1454949077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timojowexejos.rf.gd/bcom_syllabus_bangalore_university_2020_18.pdfIn PDF document text
    • http://lafizevufevofe.rf.gd/algas_verdes_definicion.pdfIn PDF document text
    • http://lidiwerefibe.rf.gd/buku_agama_islam_kelas_10_k13.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_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 4916 bytes
SHA-256: eb3ba41354855604c885ef07a8d39baf2159fd03616b14724c71ed7fc55cfdaf
font_01_sfnt_off000103f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F3 11016 bytes
SHA-256: 533f124edfa09e43dfc6f0a7e7ac5f5cea078f834304804b305e81f22d162651

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