Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffaacb941808f225…

MALICIOUS

PDF

93.6 KB Created: 2021-03-29 21:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: beae191a57c19f0ce415e4753ab57d3a SHA-1: 48a94b27669b841ade0c677f02aed43e74a9c35c SHA-256: ffaacb941808f2252a1f1959bdaf6334a91175c8c2e6b81a3452e0450cd15c8e
186 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a phishing lure, specifically impersonating Facebook. It utilizes a link farm and abused redirectors to lead the user to a malicious PDF hosted on a disposable domain. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/pomibibovis_lesuzumixas.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://soxebez.ru/123?utm_term=shopify+template+files PDF link annotation
    • http://docita.fun/dar_primeros_auxilios_traducido_al_inglsv7dtl.pdfIn PDF document text
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/pomibibovis_lesuzumixas.pdfIn PDF document text
    • http://deromgroup.com/have_yourself_a_merry_little_christmas_jazz_guitar_chord_melodyy03i7.pdfIn PDF document text
    • https://cdn.sqhk.co/ladesajisama/gD6ibqH/47056152984.pdfIn PDF document text
    • https://dobivevoxopu.weebly.com/uploads/1/3/1/4/131453544/mepikul-tereza-pivagu.pdfIn PDF document text
    • http://sdek-24.cc/samunvc5ve.pdfIn PDF document text
    • https://cdn.sqhk.co/sirojenu/if2v65l/photo_to_video_maker_app_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/ehijdhi/42040218594.pdfIn PDF document text
    • http://cardioactiveitalia.site/11414441666j0rp6.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/lavuwudipupobqh8cg.pdfIn PDF document text
    • http://bujisefebegegum.iblogger.org/babufafidaxerekoroliraf.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/jfhasie/tedugav.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/geo4jiW/hotstepper_song_meaning.pdfIn PDF document text
    • http://semazolowogafoj.22web.org/98702234382.pdfIn PDF document text
    • http://jevopapivixepe.iblogger.org/wefeniz.pdfIn PDF document text
    • https://pamoxoxose.weebly.com/uploads/1/3/4/6/134656592/8230716.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zopusawonomiwi.rf.gd/dunajomutefuzetebow.pdfIn PDF document text
    • http://bokakemipik.epizy.com/wahl_cordless_clippers_limited_edition.pdfIn PDF document text
    • http://nidawijonag.rf.gd/how_to_turn_off_casio_beep.pdfIn PDF document text
    • http://mamepekavileput.rf.gd/80917470644.pdfIn PDF document text
    • http://soreras.epizy.com/68607944390.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/cowboy_theme_song_sheet_music.pdfIn PDF document text
    • http://magikid.epizy.com/vanilla_alliance_leveling_guide_20-_30.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_off00012ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EDE 5252 bytes
SHA-256: 3d4d6510293319a78d65ddbdb82c0cc90b071fdf78fcc0722845fc84f343b6f2
font_01_sfnt_off000140a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A1 11560 bytes
SHA-256: 9ec7b80bed3886d60e82ae1b8c8749ffb65e568720d2001c4cfcffed9a128f7e

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