Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5af4a9a9ab324d…

MALICIOUS

PDF

71.4 KB Created: 2021-02-23 03:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 319af5b40daba5f1296dfef217fffa39 SHA-1: a6387de02d6607282dbed8e281e094af6725880b SHA-256: be5af4a9a9ab324d473ba390b651f183f1b3eeb28cdc4e6a2fa60a64fa2ffab9
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/damewujevifum.pdf.
  • 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://druttle.ru/wix?keyword=iuniversity+prep+dual+credit PDF link annotation
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/damewujevifum.pdfIn PDF document text
    • https://cdn.sqhk.co/gobamagedesi/SL4KejF/xexudivikemukem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_5fd6ad027c49e.pdfIn PDF document text
    • https://vigedinolig.weebly.com/uploads/1/3/1/3/131380992/kaxeromoxer-kakenigase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485012/normal_6014714b755a5.pdfIn PDF document text
    • https://cdn.sqhk.co/lesasafo/sdhdgjc/xojabezinome.pdfIn PDF document text
    • http://geleostone.online/63893974256xbdzz.pdfIn PDF document text
    • http://mynasert.online/apple_logo_full_hd_wallpaper531pc.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzikewed/ighxGji/19418784674.pdfIn PDF document text
    • https://lafadulow.weebly.com/uploads/1/3/4/5/134591129/2385533.pdfIn PDF document text
    • http://drive4mclaneaustell.com/bobosex7j0e.pdfIn PDF document text
    • https://cdn.sqhk.co/todezuzutito/zeRhikP/walking_dead_movie.pdfIn PDF document text
    • https://jagotizepevex.weebly.com/uploads/1/3/4/4/134464701/suvumoxesodafuw-pasusakobe-kanuniwiwu.pdfIn PDF document text
    • http://livethailand.fun/lizardmen_guide_warhammer_2bkza9.pdfIn PDF document text
    • http://academic-club.ru/290325919128fy27.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/9062191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://matogidujizovoj.epizy.com/adelaide_botanic_high_school_information_night.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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 5164 bytes
SHA-256: c9cdae5b2c1b0cb20073229ad973a2f11d34909ae62e1daa425e8066bef085dd
font_01_sfnt_off0000ecad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 10472 bytes
SHA-256: fb431529532f8c7c5e744f0b3dc17896f29359ca3d8d687b259c1f85ef0752aa