Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d1b6bbef9f107c…

MALICIOUS

PDF

70.1 KB Created: 2020-11-22 16:03:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e79c9df0defd6e23c2de724a19fc1a90 SHA-1: b3a6d040803ac3bf4dd23663c5f6721ca44f9bc7 SHA-256: 68d1b6bbef9f107ca56ec5b1a6882cfeefe419d7139fae0700438d14253dadc6
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to 'traffmen.ru' and a large number of embedded links, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of numerous external links, including one to a known malicious redirector, indicates an attempt to direct users to potentially harmful content.

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=fo4+companion+affinity+guide In PDF document text
    • https://sazaselofodufo.weebly.com/uploads/1/3/4/5/134590081/1652051.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/zewuxopujiwixemivupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fa50a14b0656.pdfIn PDF document text
    • https://ligekikisi.weebly.com/uploads/1/3/4/4/134492932/pebuzavifulozo.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/furararunumirirofe.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/847c57d8-4394-471a-a7d1-2e1491553c5a/16279855282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f332f5c9-3f9e-4441-af13-850e07b19734/26827544137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17448c58-ffa3-4420-b405-9e4b0a076df2/48980022710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ade5ca30-9fa9-4bf7-b78e-701c295d2591/28694817887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a8f496-9de8-4cf9-b02e-e4bb2477068e/jedetajor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d17254-5c7f-4718-914a-79af0ad7a1d2/how_to_improve_pubg_performance.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_off0000d65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65F 5312 bytes
SHA-256: 343e940415637e98bb97b449370c87c5f825f38f5631fcd3c504d39385a91f55
font_01_sfnt_off0000e880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE880 10280 bytes
SHA-256: b5d603f7ea7503396d04ac6c13217cf694b006963d41ff8f76674e1d9857243b

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