Malicious PDF — malware analysis report

Static analysis result for SHA-256 965a639e647a17ca…

MALICIOUS

PDF

72.6 KB Created: 2021-03-03 22:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6ed9ba6bd1070e85b9f12793a3f9718 SHA-1: a4f336a04c84624a5656313a2b4da86ebde53853 SHA-256: 965a639e647a17ca2990dc7aea8b31abf1f9d90183d24936ee3a68ad20020e61
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 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://fokemale.ru/strik?utm_term=what+oil+can+you+use+on+wahl+clippers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5ff542fc653e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448540/normal_601e02b3b293b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402938/normal_5fcc7a0e4b113.pdfIn PDF document text
    • http://carinsusa.com/craftsman_weedwacker_27cc_speed_starttbnez.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/RCid9ji/epic_hills_minecraft_seed_pe.pdfIn PDF document text
    • http://firstsecu-paypal.com/kazivapibutogitepwzdct.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_601e13a347528.pdfIn PDF document text
    • http://helplnstagramoffice.com/video_live_wallpaper_download_appw23rr.pdfIn PDF document text
    • http://reduslimitalia.site/3640270527ueeh4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5fcecb719697b.pdfIn PDF document text
    • http://infokurs.design/forensic_engineering_fundamentals7rq5i.pdfIn PDF document text
    • http://arendagg.xyz/database_management_system_mcq_questions_with_answerspm8qj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevinabimiw.epizy.com/my_friend_dahmer_book_download.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_off0000dee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE2 5228 bytes
SHA-256: 9191820a22da1b5558e8db59f66e7a95383d0523f7f303674f48f8cd17521ed4
font_01_sfnt_off0000f0c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C1 10864 bytes
SHA-256: 822d39137db4f0c2eab24d3ff23ab25a870beaf232bcfec23396f71e8c30b046