Malicious PDF — malware analysis report

Static analysis result for SHA-256 044bd08c4ec8ab1f…

MALICIOUS

PDF

91.2 KB Created: 2021-03-22 20:00:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bb6d244e15e3c9b4056f03658f75af19 SHA-1: 9d381d49db0394624e371e453a7f16ec9aaf482e SHA-256: 044bd08c4ec8ab1f4b75962082ee20e4639796536b004b4a4b13f887db3ecd8c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses brand-impersonation credential phishing. 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 0.9997

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://boxirerekejo.weebly.com/uploads/1/3/4/1/134108979/vimuzexepatix_mejoravujuko_rokez_detoduxafupir.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://jumiwimov.ru/123?utm_term=english+movies+free++apk PDF link annotation
    • http://netewe9.xyz/boris_and_the_dark_survival_apk_androidanw95.pdfIn PDF document text
    • http://mixevome.22web.org/pixodova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369654/normal_604a28c636c41.pdfIn PDF document text
    • http://instacopyrightcenter.com/854614377380o073.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/247375680779dxe6.pdfIn PDF document text
    • https://boxirerekejo.weebly.com/uploads/1/3/4/1/134108979/vimuzexepatix_mejoravujuko_rokez_detoduxafupir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fee8818c034d.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/abstract_tesi_esempio5ob8x.pdfIn PDF document text
    • http://fishing-rods2.club/puripujunejolurijujaxer8njn8.pdfIn PDF document text
    • http://metalllift.ru/asus_z97_pro_reset_bios7127e.pdfIn PDF document text
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/9e9ecfa.pdfIn PDF document text
    • http://mefurolawexi.iblogger.org/diablo_3_season_22_playstation_4.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/0e52b5.pdfIn PDF document text
    • http://naykaryadom.fun/75015864991j7gkm.pdfIn PDF document text
    • http://sacredname.ru/642198209538lp21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tezidenu.epizy.com/introduction_of_cathode_ray_oscilloscope.pdfIn PDF document text
    • http://foxorefo.epizy.com/12956960002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3db888c-d7aa-4e7a-a7d9-7d0067cf3e74/76042534326.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f30ed48-dfa2-45b1-a4f3-ff4e1b6753ed/how_to_get_poisson_distribution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a411c5d6-557e-441c-a4bc-9f922b55f0ff/88183843239.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_off00011d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9F 5396 bytes
SHA-256: 9efb20e5b02907793efa561ad11b94accd238bab1f2d684dc33df3400c74a04c
font_01_sfnt_off00012fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD5 2140 bytes
SHA-256: a1c68180eae955d710b1f59d89b7b5bb1f22246194deffa7b9c3298859733f9b
font_02_sfnt_off000139ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AD 11140 bytes
SHA-256: 131e384f3ec1fdc3467fb6d9a005d2d96ad498316dc3e566b197c386ff116457

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