Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b674a4adad3990…

MALICIOUS

PDF

78.3 KB Created: 2020-12-29 11:04:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce190fda96b0d2cd02b77db7d01df82b SHA-1: e29faef0167d9d169473d79d2673c6449db146fb SHA-256: e0b674a4adad39907e7f260ae3784ea3b9daa229fc552aa8d6c333726acc8570
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 a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'trafffe.ru', which is suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, but the structure suggests an attempt to redirect users to malicious content.

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=marvel+future+fight+mod+apk+techylist PDF link annotation
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/1240a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f91dd828f43c.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/duxirefasukem-vojuviduj-muvepusutik.pdfIn PDF document text
    • https://cdn.sqhk.co/gilitejeku/pohatrv/zevaxivakamufakutilaw.pdfIn PDF document text
    • https://cdn.sqhk.co/gifalaminika/y7SWiiF/lugemixogalutasemefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8a09baad135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wovedukevikov/block_ads_on_spotify_android.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/jiranorulujudezopubameta.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/c._a._t._s_apk_update.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/benisojejawe.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/65735322800.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 5576 bytes
SHA-256: 8a8bb7c892665aa920f5cbf6588bbb4945279ec1e543b981567c9dcc5c5e5443
font_01_sfnt_off0000fadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADB 10408 bytes
SHA-256: 4b154bf3f4f2753436f5ecc59a711d644ee12712707776f5a5e814806ade63ed
font_02_sfnt_off00011e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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