Malicious PDF — malware analysis report

Static analysis result for SHA-256 212e833119b535c2…

MALICIOUS

PDF

70.9 KB Created: 2020-12-29 11:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6c1f4f1a62c2d60a6ea0a813c95b3733 SHA-1: d9d89b3b37a1b54d693d4c43a643384c04d2343f SHA-256: 212e833119b535c28debde9ba458cfb3f02059259ddf2a4ccf7c1adb2d735665
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 0.9997

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=unicorn+running+shoes+nike+vs+adidas PDF link annotation
    • https://waniremupamed.weebly.com/uploads/1/3/1/4/131407535/b931925.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/fuguvef.pdfIn PDF document text
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/wefivawak.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/subud/nenorutusevufijij.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/16182891066.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/82436199240.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/answer_key_tgt_commerce_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/pazegoleruxumopigufi.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/java_foundations_4th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fbc58a-d2cd-4d1e-aa22-c00cb3fa63a6/6660925447.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/repili.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_off0000d96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96E 5284 bytes
SHA-256: 3120cbcaf4cd4ea5a4b06c8ece999474d4d6729bba9242190d6ffe0482a4778c
font_01_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 10332 bytes
SHA-256: 1c28351f7f33f1768eec44c9fd7ea1aa5850eea2536544bab3aebbe7860c84ff

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