Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac85d204f7ed3d60…

MALICIOUS

PDF

53.9 KB Created: 2020-11-08 11:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b4409255da367a7d84277fc3574f8453 SHA-1: d98a16ee28fa04b70c449134103a9ae3275b5d22 SHA-256: ac85d204f7ed3d6018a7382c438f6e0bc72fcca4581e4b81a580bcd0da78717c
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting a link farm or phishing infrastructure. The presence of URLs like 'https://trafffi.ru/aws?keyword=superman+family+comic' and others hosted on platforms like Weebly points towards an attempt to redirect users to potentially harmful content or phishing pages.

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/aws?keyword=superman+family+comic PDF link annotation
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/magejivuzove-repej-bewozemosodisor.pdfIn PDF document text
    • https://mikezopa.weebly.com/uploads/1/3/4/3/134366842/b0fc26a07.pdfIn PDF document text
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/2717493.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/jedobaranarazib.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/fcee3f.pdfIn PDF document text
    • https://fexatawolev.weebly.com/uploads/1/3/4/4/134445796/jipewe-lejolelawivomu-dasudiki-radiwutunojem.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://uploads.strikinglycdn.com/files/1e0ade6b-73a7-445e-9795-b9b90b5c1c9b/11192348888.pdfIn PDF document text
    • https://rejepepari.files.wordpress.com/2020/11/36437500418.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/gaxiforefowofazef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808ca72b-c86f-4640-8f33-0455b2af04f3/37466235757.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/encountering_jesus_in_the_new_testament.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_off000086c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C7 4992 bytes
SHA-256: 666970218fc50330efaffb06879d99670b46280a01a83527d460f8937082004e
font_01_sfnt_off000097a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97A3 11484 bytes
SHA-256: 86a928f8408129c5b88e72f4e154078b8ab02e20155326e068668e77a13dd931
font_02_sfnt_off0000bcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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