Malicious PDF — malware analysis report

Static analysis result for SHA-256 69557a590330a5b7…

MALICIOUS

PDF

81.1 KB Created: 2020-12-04 13:19:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5e9f2fef9bdbd32d0638e428bcd89d7b SHA-1: 17f7563333a7851f9ed097e404a92bb9c6441f56 SHA-256: 69557a590330a5b758dd1da54c84c026505808db14a5eb003d12bea04f85b16f
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a link to known malicious redirector infrastructure. The document body is heavily obfuscated, but the presence of numerous links to disposable hosting and the ClamAV detection strongly suggest a phishing or malicious content delivery attempt. No scripts were extracted from this sample.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=radiation+fog+forms+best+on+a In PDF document text
    • https://nosikofu.weebly.com/uploads/1/3/4/7/134724553/8059852.pdfIn PDF document text
    • https://jawibonudinozof.weebly.com/uploads/1/3/4/5/134584949/ripodilesetepekevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8885f49ba77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa985bc920a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fc9bb7117081.pdfIn PDF document text
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/kalova-korikobiximupar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486034/normal_5fbcf62d12d8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/free_build_lol_unblocked.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6695bbda9c57a97e3e323/t/5fc905daa7528e11dbb6b293/1607009755598/cute_cat_simulator_run_3d_design_home.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1559bc6d9645836252c59/t/5fc822c3bbb7f45a927e92a5/1606951620369/25412158754.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/50868252055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed9bdff-4ef8-4bb5-9af9-4e888ca36166/94788946307.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_off000101bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BF 5344 bytes
SHA-256: 085e3aff41f236123cbf36cc8474caf4b4dc490ea51f381d6f659db0ac679bea
font_01_sfnt_off000113dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DD 10532 bytes
SHA-256: bf9810d248dffb4d8f488caf088b9a61fb24c027ced9fb4c63cc91da6616ebf4

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