Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7c3eb84d470928…

MALICIOUS

PDF

65.5 KB Created: 2020-11-25 17:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c6c6eca2180f51d0eb61b0382904e799 SHA-1: d394230db7b61e162e88788633c4d8ddb21d5b15 SHA-256: ea7c3eb84d4709283cdbdef7ebd06b1bb6efa9de6c224b8a057980e8b0d2eab3
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://trafftec.ru/123?utm_term=all+enhancement+shaman+azerite+traits PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fa2561043945.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/8413904.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/kobopas_tawerelibifajeg_rukid_vuvuwafokesim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_5fa4cdd953a26.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.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/8e85a0fc-56df-472b-a886-2fed0b30aea6/88433101043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d30f49c-c426-4dcc-9a8a-b1ca625ed1a4/5392399841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf43a48-80f3-402a-8e70-1e7b1e5a6f5a/13143617876.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/biochemistry_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ddbd657-fc79-4a52-9d7c-b3c165df1bb1/andrea_bocelli_eyes_sewn_shut.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/dcuo_episode_feat_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/pedel.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/53402705093.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/defukodan.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_off0000c4ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4ED 5080 bytes
SHA-256: 94518bf32d79f30d4335f7c75b847f38945b64a35b22cf5c526be732673dad06
font_01_sfnt_off0000d60c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 10316 bytes
SHA-256: f79a692316bc9d21a637c53453679fb82a66b2c42dd6f86f753ed3d4193ab29e

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