Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76330208665e119…

MALICIOUS

PDF

80.2 KB Created: 2021-06-10 01:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a20dda06d679b5b5dfffc0a70a0ddc47 SHA-1: 339ebe3442ca37fc84736a97a82f3778df0f2caf SHA-256: c76330208665e119bf378edaaf8bdeeec6ffa1113a8a45bcebfc8127d594ab8b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm designed to direct users to potentially malicious content. The primary URL found in the document body, 'https://garglob.ru/pbw?utm_term=carrom+pool+mod+apk+unlimited+money+and+gems+download', indicates a lure for downloading a modified application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://garglob.ru/pbw?utm_term=carrom+pool+mod+apk+unlimited+money+and+gems+download PDF link annotation
    • https://xorusisu.weebly.com/uploads/1/3/4/3/134314808/futulemalifav.pdfIn PDF document text
    • https://gaburizopa.weebly.com/uploads/1/3/1/4/131438784/jibogopologezo_mevar_runopudikojuf_zuvederawozopaz.pdfIn PDF document text
    • https://zoxofaduw.weebly.com/uploads/1/3/2/6/132683138/kiduvivijemu.pdfIn PDF document text
    • https://tikuvafijosil.weebly.com/uploads/1/3/4/6/134685963/kazalugorowakem-depuvov-sokisoga-ropimupuxakub.pdfIn PDF document text
    • https://zisawotagaxikad.weebly.com/uploads/1/3/4/4/134478332/wakavobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_60648823d5039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5fd79e92404e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_6028bbaf76d87.pdfIn PDF document text
    • https://jejojoroliwe.weebly.com/uploads/1/3/4/3/134310913/8613500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_604495e6ccc8f.pdfIn PDF document text
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/benezelawuvuf.pdfIn PDF document text
    • https://besukefovubon.weebly.com/uploads/1/3/3/9/133997228/vikuwapudiz-lutilefif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451044/normal_5ff3dd431d665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_60bc22acac277.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/491876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394068/normal_5ff9888511430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_5fda6efe1bb2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2e35ca6d-baed-408e-843d-b75f8fcf8c1d/duxef.pdfIn PDF document text
    • http://wirajudukim.pbworks.com/w/file/fetch/144758337/what_is_whaling_dod_cyber_awareness_challenge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4e056b-fe8f-4a7f-81b0-9512b4f50ecc/chronicles_of_the_gatekeeper_review.pdfIn PDF document text
    • http://tedadopite.pbworks.com/f/can_you_recover_deleted_android_text_messages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b086dd-b749-4dc3-beee-206dea36be92/vobal.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144994002/fuveweludupuxudisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32bcbaae-85e5-456f-a57c-e8c65e5f7f05/kegikovu.pdfIn PDF document text
    • http://podimil.pbworks.com/w/file/fetch/144567438/xazibunakim.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/venerefuroxoluralirugot.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5444 bytes
SHA-256: 8f45621b991e15b35574094b62d17d506cb9c42701741d81b982d3cdd4768303
font_01_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 20480 bytes
SHA-256: a237ffff7461997a3ca155490f4263292289cdb5e58307e6e4cf9b4b8ee12e87
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f