Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe53704ab04c779…

MALICIOUS

PDF

73.6 KB Created: 2021-01-08 18:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7250ada123de7d5d8f9fa1468ba7330a SHA-1: cc45616b08bd48197b41cde31e5ae31dbb4c861b SHA-256: 1fe53704ab04c7799c78a9b79cf988b123a8009ee371c4503a74aea8b2b30c01
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs point towards an attempt to redirect the user to malicious content, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/123?utm_term=thunderbolt+magnum+solar+charge+controller+manual PDF link annotation
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f90ea41aec07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5fe9f3944934d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373526/normal_5f8b6ae152d2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f8f8ea-5477-4a2c-a630-daa8fcd9e723/volunteer_rejection_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/careless_whisper_piano_sheet_music_musescore.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/google_cdn_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/40k_7th_edition_rulebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76074cfd-1b17-499c-babc-05930967f1b1/rubrique__brac.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/clyde_green_springs_school_board.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf4c567-227b-432b-9efe-bdb414a44b31/95329490690.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5444 bytes
SHA-256: f31f98d80ad3f734ee6e34ca27131058cdb183cad11b12c2a60005aaafc5bb44
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 11256 bytes
SHA-256: 7d84f67c7199f3893bcbe25b384767448008ff4df14d97262d022060ab4973ed

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