Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5fe1947a89eb3a…

MALICIOUS

PDF

66.7 KB Created: 2020-12-04 21:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8e23cbc7407744ced706cc78c020d1d0 SHA-1: 9c0ef1ecc3569585fce9ab086f4a6b7b00e9ccea SHA-256: de5fe1947a89eb3a54e2afd917a32daa37a1d61cf45e5f0284238da09ca6f07b
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://trafffe.ru/strik?utm_term=is+because+a+causal+conjunction PDF link annotation
    • https://getawotenag.weebly.com/uploads/1/3/4/4/134443600/takomiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fb03c7c1c649.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/julafodorifiselaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5fad3fea1d182.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://gedevoliritigit.weebly.com/uploads/1/3/4/6/134686631/4320534.pdfIn PDF document text
    • https://vezutubiwewo.weebly.com/uploads/1/3/4/5/134507618/2659186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393751/normal_5f98ed92b0247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd35f904971d5155d5820b/1606235647121/a_cappella_groups_in_pitch_perfect_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc664b2ec917750a3fd1bf4/t/5fc8226dd17d55300fa20b0c/1606951534098/47356097883.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d88a504bb4653ce18603/t/5fc8b749b74dd54858df71db/1606989645434/80790975449.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/aaru_songs_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/52120800006.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf53100f7af3919d2dd22/1606219059508/dofigumipalobalokarigi.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_off0000cb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB14 4852 bytes
SHA-256: 5f5109c35d780f61010a9d72274bc07c211dda8cea16b87d49b95900231771d6
font_01_sfnt_off0000dba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA9 10136 bytes
SHA-256: dc45847c8f8467ba80936f8915780dcc6c35e19b2b7c808e03730b07639d4db0

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