Malicious PDF — malware analysis report

Static analysis result for SHA-256 6029324f0bc51897…

MALICIOUS

PDF

88.8 KB Created: 2021-03-30 01:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 92a4103b3464e8ddba3251085676516d SHA-1: 7c1096a5d609e80faf4b878fbc0b2df6787d1cdf SHA-256: 6029324f0bc518979e5b3eabb62ecc1c9436f4e76cd246333ebea3664c5e0f3c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://golowaki.ru/award?keyword=acidosis+tubular+renal+tipo+1+y+2+pdf PDF link annotation
    • http://fotogodopuxet.iblogger.org/deformers_trophy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/jjYmXOt/cafetaria_marco_werkendam_openingstijden.pdfIn PDF document text
    • http://xajuguzim.iblogger.org/walter_chilambo_songs_audio.pdfIn PDF document text
    • http://kigalasabipigo.medianewsonline.com/62883005662.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/iaQiiTX/smart_car_price_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/ifDjehc/88307024244.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/OqNhegf/86276922927.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/igegess/blue_mountains_train_central_platform.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/dEInCoW/13453205101.pdfIn PDF document text
    • https://cdn.sqhk.co/nakizenonetu/XuO7rjc/justin_timberlake_song_friends_with_benefits.pdfIn PDF document text
    • http://vojidovalo.iblogger.org/zilunirazefiregap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_01b88ae4baa444eaa4f8a3189814da49.pdf?index=trueIn PDF document text
    • http://kimugad.epizy.com/83041574577.pdfIn PDF document text
    • http://lurolubudoruk.onlinewebshop.net/fetifazo.pdfIn PDF document text
    • http://winefop.epizy.com/how_to_search_a_on_ipad_pro.pdfIn PDF document text
    • http://sofiwige.rf.gd/tamil_biography_books.pdfIn PDF document text
    • http://junenizexi.epizy.com/creative_cv_templates_doc.pdfIn PDF document text
    • http://nikibulafejew.rf.gd/xoxebag.pdfIn PDF document text
    • http://bevivose.rf.gd/kudigor.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/australian_tv_guide_queensland.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_ed0519895ec94ca39cb194fabae219fe.pdf?index=trueIn 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_off00010aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA5 5444 bytes
SHA-256: 5077603205670111d556bc7d49cda4bfb1dccb9c72920f8332704d2615c33cfa
font_01_sfnt_off00011d36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D36 12360 bytes
SHA-256: a589fdd8416dfe57d799ae9a913d73f2332e7c8e45ac643a42ad7b0ee447a3ad
font_02_sfnt_off00014572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14572 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361