Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b49df382e93d9c…

MALICIOUS

PDF

82.3 KB Created: 2021-04-07 22:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076d288adc975a36645db0a247be19c7 SHA-1: b5849cee6efe2cbf0eeb5c8ac07f45c09a0a6ac1 SHA-256: 60b49df382e93d9cbe3c9702b18418e496cdec3405cff5e0975fb6033d887c1b
204 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-themed and point to benign content, but one primary link is to 'seumenha.ru' which is suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and 'ML_NYX_PDF_MALICIOUS' along with 'CLAMAV_DETECTION' strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search terms, likely to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=how+much+are+old+star+wars+figures+worth
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/6899269.pdf
    • https://cdn.sqhk.co/guranotup/Kmij0wV/screen_time_passcode_iphone_reset.pdf
    • https://zibezalobe.weebly.com/uploads/1/3/4/5/134529300/daxof.pdf
    • https://cdn.sqhk.co/vipabure/gfglid6/fimedamuxereveviv.pdf
    • https://jexepasevotapak.weebly.com/uploads/1/3/1/6/131606223/be1277b28b6.pdf
    • https://wugedelujexot.weebly.com/uploads/1/3/1/4/131456191/9bb2abb649.pdf
    • http://mananeje.66ghz.com/jerurapirokotuduv.pdf
    • https://cdn.sqhk.co/lilapanorup/MxhiLzc/mozaruferep.pdf
    • http://mananeje.66ghz.com/jeru
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/numunenoji/arizona_state_football_uniform_schedule.pdf
    • https://s3.amazonaws.com/daxemo/tai_chi_classes_online_free.pdf
    • https://s3.amazonaws.com/wetevali/dos_almas_gemelas_libro.pdf
    • https://s3.amazonaws.com/fosalizuzu/whatsapp_application_for_android.pdf
    • https://s3.amazonaws.com/xalasawu/94268964016.pdf
    • http://tuvawewopuje.rf.gd/36406798782.pdf
    • http://jobiduleger.epizy.com/dufumojajafowewokoki.pdf
    • https://s3.amazonaws.com/damerirazib/annadata_movie_video_song.pdf
    • https://s3.amazonaws.com/pusixa/one_reason_for_the_adoption_of_indirect_rule_in_british_west_africa_was.pdf
    • http://nelenubo.rf.gd/bteup_scrutiny_form_2019_jobriya.pdf
    • https://s3.amazonaws.com/norozovijalu/92863629130.pdf
    • https://s3.amazonaws.com/tabobujimo/xakatexazovikef.pdf
    • http://kawetagomududu.rf.gd/birikedilulozuw.pdf
    • https://s3.amazonaws.com/vavapekadoliti/amendment_procedure_of_the_indian_constitution.pdf
    • https://s3.amazonaws.com/nimuwet/22597758293.pdf
    • https://s3.amazonaws.com/mubefula/is_s_curl_bad_for_natural_hair.pdf
    • https://s3.amazonaws.com/vufupu/9361138742.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102f0.bin
96de05bac34671145594703566cf6b5684b708c24e9ff80c66db57932a95c838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 5488 bytes
font_01_sfnt_off0001157e.bin
1b6ca14345af0358dd462d25b6c24cf200118bba3ae4e568f13881cbcc580547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 11132 bytes

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