Malicious PDF — malware analysis report

Static analysis result for SHA-256 df1988f405c69d12…

MALICIOUS

PDF

95.2 KB Created: 2021-03-24 08:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21fa02fc041e9543510f92be141f852d SHA-1: a6eb80912e457998ff65374fba79b5196a038c3f SHA-256: df1988f405c69d1233b539eeb658799be8c1b2cfbc21b049fb6f719346a79cf1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to suspicious domains, and is flagged by ClamAV as a phishing trojan. The embedded content, though heavily obfuscated, suggests a lure related to popular game content to drive users to malicious sites. The presence of external URI heuristics and the ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/wix?keyword=skins+for+minecraft+pe+apk
    • http://santecmb-sarl.com/does_chick_fil_a_have_paid_trainingpu80t.pdf
    • https://cdn.sqhk.co/mosizuwowux/hfhehgG/mafafovizovuwoju.pdf
    • https://cdn.sqhk.co/tosilura/sgqU1hh/okay_thank_you_siri.pdf
    • https://xemilesexevig.weebly.com/uploads/1/3/4/2/134266110/9617075.pdf
    • http://cethq.xyz/99063768219lngoi.pdf
    • http://fashion-deals.xyz/tozulakuguzuxezura66l.pdf
    • http://theplafond.xyz/mapeteg27f3.pdf
    • http://goromeo.club/bohemian_rhapsody_piano_solo_sheet_freeuavr2.pdf
    • https://cdn.sqhk.co/sodelaranu/iVWhj3b/amara_melee_build_guide.pdf
    • https://cdn.sqhk.co/vekunego/iHjdEib/the_sims_4_cheats_university.pdf
    • https://cdn.sqhk.co/jurufovowufu/DunyheJ/xisunojebufawomoxipopim.pdf
    • http://com-servers.online/charles_shirley_jackson_characterswdoi0.pdf
    • https://cdn.sqhk.co/retobumoki/5Uig8ge/sonic_the_hedgehog_minecraft_pixel_art.pdf
    • http://qunit.space/mekanisme_metabolisme_karbohidratnmgeq.pdf
    • https://piwoviwilo.weebly.com/uploads/1/3/4/3/134386066/vabog-komabibewirifon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/961bbe20-767d-400f-b6a6-5bae0e7c59d0/zedadu.pdf
    • https://uploads.strikinglycdn.com/files/341d8263-038c-4f5c-bab1-566864de912b/ropakipoberaja.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_off0001364d.bin
d4f12916f968b210de56fcf490af2994f64e307c04aa33a78461a1c92cee380d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1364D 5296 bytes
font_01_sfnt_off00014844.bin
3d799aecb38d1472c815581502dc8cedf6e8c3119e4aaf723d92f803e56e30b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x14844 11352 bytes