Malicious PDF — malware analysis report

Static analysis result for SHA-256 63eb41ce82f26445…

MALICIOUS

PDF

72.1 KB Created: 2020-11-22 04:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cc016112cbfbc3408f335a1079ebfa13 SHA-1: 5c80d8e1773e9bcad75a06496a1f8f19e2de8a4a SHA-256: 63eb41ce82f2644575fb17bc2c110dd8eaa72e7535a06ce9ed812128940064fa
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/123?utm_term=cleo+vc+gold+apk+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f8a6b56a9370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_5f98823a728eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466996/normal_5fa4128a2f2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f96cb6841d08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fb73d2ad5db3.pdfIn PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/movapurebuso-zugidoku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378618/normal_5f8f0290ee726.pdfIn PDF document text
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/bijegoxog-dalorizi-berexaxobe-vugiwigisefek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413112/normal_5f9d876471052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405950/normal_5fb859d3ef014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fb48389d2a11.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/nixunuxezo.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/votawawo/vezoreb.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/74214293526.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_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 5268 bytes
SHA-256: 029b66e49d600167e537d4433205b88f464849fd562de01408feb9d875c7c894
font_01_sfnt_off0000ee48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE48 10900 bytes
SHA-256: 5edc93b2baae3dea805376a17543b149b34de44efdd504ea80223bf165539511

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