Malicious PDF — malware analysis report

Static analysis result for SHA-256 951e02114a1dc229…

MALICIOUS

PDF

40.7 KB Created: 2020-11-06 14:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c5b3fe68353dacf4884c8d4b1d64db42 SHA-1: 23001c387b881706b0112a923ce20f6b0cb77fe7 SHA-256: 951e02114a1dc229660d3e5239b3d8f9cf35a81a82c7b3376f8a687616da164a
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URI that redirects to a URL with a search query for 'infinity blade 3 apk obb'. This suggests a lure to trick users into downloading potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the embedded URI is a primary indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=infinity+blade+3+apk+obb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f9893c9470ea.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/vupububemilun_zinisosesawijen.pdfIn PDF document text
    • https://legobunisazej.weebly.com/uploads/1/3/4/5/134501617/1936732.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/xawapebuw.pdfIn PDF document text
    • https://tadafami.weebly.com/uploads/1/3/4/3/134386911/4177356.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/badesimunosekevova.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/sepawi/xonuvuvimamitikeputevedu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f0db55-b8de-468b-b96f-99ce1fb8a145/juxudeweda.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/54872961727.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/protagonist_antagonist_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/95476036552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/940a0c82-7cc8-4c6f-ba13-aece4c435d5a/wojodinugutexurufojuv.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_off00005c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 5168 bytes
SHA-256: 17b1139a5872a30b1472f38efa7a143126cb9dc37fe4b7f4af54970e9737eb03
font_01_sfnt_off00006df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF0 13880 bytes
SHA-256: e8ddf9876fa3c2556c88726259668020411806c682d829766b9f332b17341d39

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