Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7fdcb8e49d71b8…

MALICIOUS

PDF

72.9 KB Created: 2020-12-02 14:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 63788798667b649d7d5736378f680294 SHA-1: 3bafb1afd11c4868557fc7c7bbe204ca4747703b SHA-256: af7fdcb8e49d71b85ac05dc625a7bea2033ce8d7a67a65e2d7b9201b01e28ed1
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a link farm with numerous external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. The presence of embedded URLs and the overall structure strongly indicate 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?utm_term=brady+bmp71+printer+driver In PDF document text
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/3214073.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/3000393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_5fb2b7f8539d8.pdfIn PDF document text
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/7124555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f92b4941c653.pdfIn PDF document text
    • https://xenifopiri.weebly.com/uploads/1/3/4/5/134507673/zuwuripewif-vepivugo-xofira.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e4761e25426e12f0846/1606372935671/21190209700.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/zelda_level_7_walkthrough.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe32af9d79364840592092/1606300336681/12912547674.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/hampton_bay_spring_haven_grey_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/29882980438.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/asurion_metropcs_affidavit_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/kixokebegesod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CD 5056 bytes
SHA-256: 0ca30feeb81a8f0e1a1e16ed631f51519e6cf47aeccd07216cced665fada02cc
font_01_sfnt_off0000e3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 10656 bytes
SHA-256: d09b08b4cb4dd8b0a406dfe751505780947d4b9eb09ed99e7e45a6a2e78ca030
font_02_sfnt_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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