Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59493d1ce06c410…

MALICIOUS

PDF

69.7 KB Created: 2020-12-09 16:43:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7d80a5e53094bfe961beea008487f36b SHA-1: 18b53fbef258ee87878ee9de008375aa44795653 SHA-256: f59493d1ce06c410814709d35c2f422ed56a7b3500d711eb00a90aebda6ffa28
186 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially malicious content. While no scripts were explicitly extracted, the nature of the PDF and its numerous external links strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=the+lessons+of+history+pdf+drive PDF link annotation
    • https://wisixujedos.weebly.com/uploads/1/3/4/7/134732494/6607299.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454172/normal_5fc59a6b70d2b.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/9030a0016950b0.pdfIn PDF document text
    • https://dagevonedil.weebly.com/uploads/1/3/4/7/134736192/fujirumavoxale-xinowidebatibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f9300467e73a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469630/normal_5fa93a78ebeb5.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/8759038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fbfde6e64e66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fbdd2736351a.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/norozovijalu/effortless_english_speaking.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/blue_water_grill_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/88296255635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a2d18c-ea66-4975-97fa-d1da577208b3/vinojaxevogufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466c7626-9a6b-4f4f-97cf-bb4fe6748329/traitement_bronchite_asthmatiforme_e.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_off0000d72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72B 5028 bytes
SHA-256: ec162c0b35afccc147808f30bb5fd7fb6e1112e06cbd484befe54e519c45ca27
font_01_sfnt_off0000e853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 9740 bytes
SHA-256: 25f927ecbe8fc0cffa9de878a6a690b2fe4a5c8b21780683ecaa0af05fb40878

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