Malicious PDF — malware analysis report

Static analysis result for SHA-256 2728c27ae036e98f…

MALICIOUS

PDF

99.6 KB Created: 2020-12-04 13:48:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 12a1f0707b1631d8e60759bade55d31c SHA-1: 1ff326638d63595d7d06f1d01629a262c5853298 SHA-256: 2728c27ae036e98f338ee75de62aabb77d6e7e1f80ba55bcbaf44bd4e958e17f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs points to 'trafffe.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=flash+thompson+spider+man+movie PDF link annotation
    • https://kirimanadawa.weebly.com/uploads/1/3/4/3/134383910/musumuxir.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/4292949.pdfIn PDF document text
    • https://xebokedobonu.weebly.com/uploads/1/3/4/7/134719403/torubekek_xalamad.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/16507ef2-d0c9-4768-af3c-187d6ea383f9/58443051993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f992c36-a46b-40a6-974c-2339d07084bc/2451939784.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/junikesubowojalefapan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f990be18-9b47-490f-afd5-6dcd24317d58/54619924161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750b1706-04e5-4bb4-a489-e5e8d3895341/pikanuxuzadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a0f54a-8eca-48c0-ba90-a19f6ebf93da/vonukazotuzekajapuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b423c4-3c9a-4e2b-b5d8-49db54a368ef/openiv_installing_mods.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/hoodie_template_illustrator_free.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_off00014721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14721 5212 bytes
SHA-256: 0c2dec2f8c147033aeed39a46cc8da98ac1ebcec8054a509e24f006b5cfb9b41
font_01_sfnt_off000158b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B2 13028 bytes
SHA-256: cd1851dce75421e6a7141e5ddc3fe71e10e955eae42f8bc7c773c4a4993b054d

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