Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e1d66f284bbaa6…

MALICIOUS

PDF

65.8 KB Created: 2020-12-26 16:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ee2d76b7add6e3ab0e13e0f000c08b5d SHA-1: 854fc6dfa10c5b940a7b54db179f5fab4c5adff2 SHA-256: 89e1d66f284bbaa6091f3d19d1808d88d6c0d49b73acac5e31422c7f2ab8c3a8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URL 'https://trafffi.ru/strik?utm_term=angry+red+button+game+unblocked' suggests a lure related to a game to entice clicks.

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://trafffi.ru/strik?utm_term=angry+red+button+game+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fabd46b9ae3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450631/normal_5fe3af6bc09f2.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/BheW5ib/sekawiloza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485435/normal_5fc68b6d560d5.pdfIn PDF document text
    • https://xivimuwujaka.weebly.com/uploads/1/3/4/4/134440816/tadidoputamedojoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f97577c09599.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/megujobemegor/lerozivu.pdfIn PDF document text
    • https://s3.amazonaws.com/remoxi/70623610185.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/kpop_2020_comebacks_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/rogujuxutuvenu.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/66021382534.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/jotofofuvodesejevagisamo.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/auslogics_boostspeed_8_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sepokerewesomavoduwegub.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_off0000c4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D2 5376 bytes
SHA-256: cd404549e9c8802f54cfe8237e2a0d0207b4526ad96e441ebe0b3ade836b1123
font_01_sfnt_off0000d715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD715 10408 bytes
SHA-256: e5e3afcccdd691dfaad2b3ca9d2cb9ddf909581e76cab999da6cbbe0abd08597

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