Malicious PDF — malware analysis report

Static analysis result for SHA-256 df07ab292fb2b2bc…

MALICIOUS

PDF

75.9 KB Created: 2021-03-31 13:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 470b182d29f29192ca575b913e69704f SHA-1: cae10d34844de93d71bd8665d04304ba1a249481 SHA-256: df07ab292fb2b2bc0e4328ce689993ced93aea3d468663fae86900398c5e5abe
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The document body, though heavily obfuscated, contains text related to 'Obamacare' and 'wkhtmltopdf', suggesting a lure to a malicious URL like https://mezovuduw.ru/strik. No scripts were extracted, but the PDF structure and URL distribution point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/strik?utm_term=how+much+to+qualify+for+obamacare PDF link annotation
    • https://cdn.sqhk.co/sixepatexup/Tghixia/49932234719.pdfIn PDF document text
    • http://tivewuba.iblogger.org/64845367177.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/jblihhj/31932806622.pdfIn PDF document text
    • http://jezolagewe.iblogger.org/answer_australian_pronunciation.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/dQSOWJo/zibugipawojewibome.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/EIR6tja/lizard_beans_leopard_gecko_care_sheet.pdfIn PDF document text
    • http://medway24.com/carbon_steel_typesm6s3r.pdfIn PDF document text
    • http://optamorem.com/mitupediwogonabefatocp111.pdfIn PDF document text
    • http://bijatutolime.iblogger.org/process_improvement_plan_template_word.pdfIn PDF document text
    • https://cdn.sqhk.co/gikokimofegi/gifhhW1/pefemosorinuvo.pdfIn PDF document text
    • http://menformula.xyz/setur9mdx7.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/ligole/65405591732.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/junazuvezelubelobav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/891e7459-421d-4d28-80cb-866b5d5752b7/how_to_set_up_graco_pack_and_play_with_bassinet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe054d9-0226-488e-81d2-4b06bdf77783/44256008522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/690009fa-b68c-4406-af8a-b89cddae1e80/bavenixetaxopikipavuxogap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951ade87-6f94-4752-9ad4-b663914f39ee/72179239290.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/59597107251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbc8a30-c6e7-44bc-bd21-eec5d5587a2a/material_science_internship_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/play_store_apk_upload.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/lansweeper_helpdesk_reporting.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5364 bytes
SHA-256: c9ea3bea13cad4270d499bea2cd553636e4168991446d5f65f9e7597e439954a
font_01_sfnt_off0000fcdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDF 11028 bytes
SHA-256: 69131e7a24602671b569102d31f4cadc23ac2e4a7ded5d5abf062682da65684a

Open this report in the interactive analyzer, or submit your own file for analysis.