Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb2953ed5fc94a3…

MALICIOUS

PDF

77.3 KB Created: 2021-04-03 02:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0b856e87ae4e93b94d724a73ae36cea0 SHA-1: a6ba7ddcd985a86d4ebabe8840a6d0b55a5c98e6 SHA-256: dbb2953ed5fc94a3976be0122527e1168bf8c05478f353ead24488ea260bd6b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains multiple embedded URLs, with a primary focus on 'https://lozipotod.ru/award?keyword=westworld+black+hole+sun+sheet+music+pdf', suggesting a phishing or malware distribution lure. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The authoring application 'wkhtmltopdf 0.12.5' is also noted as a potential indicator.

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 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://lozipotod.ru/award?keyword=westworld+black+hole+sun+sheet+music+pdf PDF link annotation
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477164/normal_6014fbc7ae925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_5fd6d4166493c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_603fb92e37bd7.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/3718808056.pdfIn PDF document text
    • http://tapodozinojet.mypressonline.com/16637248959.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/f6dbKge/fupedawuw.pdfIn PDF document text
    • http://luxusirozutifud.22web.org/biostatistics_for_public_health_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff95df1c341b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_b192edc841744749a0488412e0a3712b.pdf?index=trueIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_37dc346f188148fb8ad3b6e5ca13b70a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4fc8fd-38c5-48fb-ba1f-6d4884556333/99822924887.pdfIn PDF document text
    • http://bexalawisilinot.epizy.com/zomakevodigamivogujabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd104fa-d083-4ad9-b3dd-e11a2b4ed49a/mother_tongue_amy_tan_rhetorical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902bd758-6915-4b45-abb6-e73e466ad416/pagaxemotafige.pdfIn PDF document text
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_5c1df6778bf94cc5a8d38b9daf766344.pdf?index=trueIn PDF document text
    • https://034b020c-baab-45d1-b3ff-c950d21f9178.filesusr.com/ugd/3c93bc_24882fcf8e5f4b0ba669acd3544af20c.pdf?index=trueIn PDF document text
    • https://7d14b3fe-44ab-47f5-a5a4-fb5d7998febd.filesusr.com/ugd/ba499c_3143a0de28c141279a8bec4eb0cb2658.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2202e34f-dcb7-4b67-b357-5d05224234ad/what_is_the_difference_between_a_commissioned_and_a_non-commissioned_officer.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_off0000f0f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F9 5704 bytes
SHA-256: 1d01c7a577179cf2d51db0b4343603ea15fbb9a533862033b1e4792a0ddb1050
font_01_sfnt_off0001044f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 10476 bytes
SHA-256: 3af6a42887e2577f44b13bfc32614c0241af94b54d0730c11f44331a730868f0

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