Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c6de699754c2eee…

MALICIOUS

PDF

80.5 KB Created: 2020-12-31 18:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7d96106e6f72f53451b2b31a9e598406 SHA-1: ee98a40e7803a6a1a62066a28ba4f7f6703abd97 SHA-256: 6c6de699754c2eeee623b0629cdd0b951c2d9fa0fe2c7fc206664ae039325acb
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier also indicate malicious intent. The document body is heavily obfuscated and appears to be junk data, suggesting the primary function is to host and distribute malicious links.

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://gettraff.ru/strik?utm_term=horizon+blue+cross+blue+shield+omnia+gold In PDF document text
    • https://cdn.sqhk.co/pezolaje/hvgcoFU/46820960190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f87aa85a584c.pdfIn PDF document text
    • https://cdn.sqhk.co/golomamone/IjfkIjb/xirunavagojavuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407782/normal_5fae467273d85.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/qP3Hhjd/bopawadivebete.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/lCeYhfa/wojupuxowebutodafeposi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449014/normal_5fc84484eefb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491725/normal_5fe3d6da03ae9.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/8055027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5faae34d5f4dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392220/normal_5f99c8305e3ff.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://s3.amazonaws.com/zevutebulaworel/vuwibef.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/miracle_box_crack_gsm.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/brisant_prominent_reporterin.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_off0000f159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF159 5304 bytes
SHA-256: 8d0cfd0010a40658aa50da0a5644a9348f6700ee1db7258dcb2a55303871116b
font_01_sfnt_off0001031e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031E 10432 bytes
SHA-256: 6629474dd6c1e52af7de4686407196153417877f1d7c6006d0d6e0a160854d86
font_02_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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