Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe2e33de6f22ddd…

MALICIOUS

PDF

78.6 KB Created: 2020-12-25 20:09:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ebc7bb6e298064f86408f5f683db7630 SHA-1: 9accf0e194cba20967c0d3ef43d90fe39d8167d0 SHA-256: cfe2e33de6f22dddf23d12731e064a1bed527b3952bc5f7117fd2b205cc467d2
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://trafffi.ru/strik?utm_term=star+trek+battleship+parts PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368955/normal_5fca5bbe1e19c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413226/normal_5fe2cfcda717a.pdfIn PDF document text
    • https://retowukiri.weebly.com/uploads/1/3/4/5/134592720/9179437.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/9201711.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/jevelel/speak_softly_love_ringtone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/jaxukik.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/keguzeketewalarevegej.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/65061089289.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/63015200593.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/1025012401.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/federal_code_of_judicial_conduct.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/fulikekozekopanadodati.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/84301874794.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_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 4788 bytes
SHA-256: 89716babd79940b998034bcbb1fef68b646f82a5592d5f7d0fb3e783d1e2c00e
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 11192 bytes
SHA-256: f261c2d0e2e5a6d6324b30cb77ee10c855897576a38d4d8ac88006242b32bb28
font_02_sfnt_off00011f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F53 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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