Malicious PDF — malware analysis report

Static analysis result for SHA-256 07fb722f500b316a…

MALICIOUS

PDF

67.0 KB Created: 2020-12-22 14:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6f3a87078dba65756dd82c3a8bf02476 SHA-1: 2bdc57a45d9e9f1c9011a6fa9c7b143a1017adf7 SHA-256: 07fb722f500b316aca6200ab461c2c156034ea1086b2b587051bebdb6d94c8e4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'traffmen.ru'. This suggests the document is designed to redirect users to potentially malicious or scam-related content. The presence of numerous external PDF links also indicates a link farm strategy, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=ant+farm+with+queen+australia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fa3e3d5653f5.pdfIn PDF document text
    • https://wimejevufafej.weebly.com/uploads/1/3/4/3/134379448/4782571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f9796b9c55ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5fa6b9dda9840.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401732/normal_5f98aa242a688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_5fa8397c28272.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/cbc45768-13ea-4665-84c5-5243841bb291/towuki.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/barewipab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f824bb1c-c402-4b2d-95d1-46f0d52d5784/59421664864.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/zediruzakojukozusab.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/92978317167.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5da8d3dfdd95b60f715bd/t/5fc76d516beae45431665f40/1606905177572/lutukelapupuluxiw.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_off0000cb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB41 5212 bytes
SHA-256: 41295e852289460a1e41031c9f6143c88b9d9ea397f05394322a8c0414a803f8
font_01_sfnt_off0000dce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE6 10148 bytes
SHA-256: bbb234efaac1b8f5fc149a64fcba8567e9bf9c462acded5f8b2ebba6f2a1e21b

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