Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d06df7f7d1ca1b…

MALICIOUS

PDF

69.5 KB Created: 2020-12-03 13:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 217a5fa7982a6cc50aafed386fe53662 SHA-1: 4f88883dd93ba8b8561ac3415f711d54d139753e SHA-256: 41d06df7f7d1ca1b907f4db672316ddb3896eda83c842c05d8c0452a6448af59
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including one to 'traffset.ru', suggests a phishing or link-farming scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to potentially harmful websites.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?utm_term=peter+zumthor+therme+vals+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425229/normal_5fa38899d1692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_5fb026633ff3e.pdfIn PDF document text
    • https://rimowaxa.weebly.com/uploads/1/3/4/6/134610435/robewekeredesefep.pdfIn PDF document text
    • https://jimitorivav.weebly.com/uploads/1/3/4/8/134878901/4f6f07d37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387925/normal_5f96964739769.pdfIn PDF document text
    • https://mugilofovoki.weebly.com/uploads/1/3/4/6/134616553/9691702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fa659ce1b1fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_5fa886487fde0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f9976e931fef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392666/normal_5f9874aad60b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fac48615f06e.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/jaxesabi/semi-acoustic_guitars_for_sale_uk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe22e29d7936484057a079/1606296291389/genius_g3500_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/tiborowofugiduzupuwa.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_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 5392 bytes
SHA-256: 9fd831000d2141c11e0548f0ac2ae81484ce9e6354064b1b82df2e5489f3efce
font_01_sfnt_off0000e380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE380 11184 bytes
SHA-256: d2ac4d4cf45a2101ec3aa5ff3128ce5692523d9d0475afcc79e7b62947e2ac1e

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