Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0154e79f424583…

MALICIOUS

PDF

74.1 KB Created: 2021-04-28 22:23:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f715003f8c7e030160af3f10dec03d71 SHA-1: 1943843d7d1625ca83523351a4f3dbbd3bbd4424 SHA-256: aa0154e79f424583e56194c4b5f6a1c21d472a336bcfd3d777d1fdef5d50d9eb
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its structure and embedded links, which are indicative of a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host numerous links on disposable domains, likely to redirect users to malicious sites. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive content and link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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/strik?utm_term=temas+adventistas+para+jovenes+pdf PDF link annotation
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/webugimeroxem.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/how_to_make_your_own_hard_seltzer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_6047c809d2596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417039/normal_60540877979f3.pdfIn PDF document text
    • http://vashastrahovka24.ru/gevojajijisu3tuev.pdfIn PDF document text
    • http://crystal-light33.ru/pawefazirigafeofmd1.pdfIn PDF document text
    • http://meetdouche.xyz/bohemian_rhapsody_queen_songbpuil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_6056611618e4e.pdfIn PDF document text
    • http://formblckr1.xyz/219934146230z8p6.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/03fd14652849.pdfIn PDF document text
    • https://tarakemutelomul.weebly.com/uploads/1/3/2/3/132303353/kefibod-pinefagosokozoz-penoladunol-juluvan.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/kikavisewemefoz.pdfIn PDF document text
    • http://scarcebook.com/26759920074bkt2b.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/bunojabu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/brazil_song_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5bd8adb-9a68-4d6a-8854-e9c7af05cfc5/jinimetitidewalij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee7a2629-4d19-42d0-9058-346c65f955d6/78004009534.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/sas_macro_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a292a2d4-1062-41f1-836b-03c9574857ed/stihl_battery_lawn_mower_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/rockstar_ringtone_zedge.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/riwukerupakoboride.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/48747246762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6944f0b7-ba47-4e2a-8b19-38dd0f8b8da4/why_wont_my_vizio_turn_on.pdfIn PDF document text
    • http://rorokepu.atwebpages.com/10250307075.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/8607991949.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_off0000e1b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B3 5240 bytes
SHA-256: 1d5be72683028b1ed4f628caebabbbae4f0cb1614a8015c9dcba7cc1de43b897
font_01_sfnt_off0000f378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 11692 bytes
SHA-256: 7e942c8b4fa2e30354662f5997ac54fca95ad372c464da715a45fb81b4625635