Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a163563f6fa59e…

MALICIOUS

PDF

75.4 KB Created: 2021-03-27 18:00:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f4de65e3ead9f9564fb2022af935e3 SHA-1: baddad1352c216af1f816a6659dec9dfd25fd04b SHA-256: f2a163563f6fa59e51450ee77f69b69f832a38c3ac4b42b94ba9da9184648bfb
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to host malicious content. The document body is heavily obfuscated and appears to be generated content, further supporting a malicious intent rather than legitimate document sharing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=strategic+group+mapping+is+a+technique+for+determining
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/sixejijajum-ginufonorowide-vetos.pdf
    • https://sovomebidug.weebly.com/uploads/1/3/1/3/131379042/biririjiror.pdf
    • https://bijasekimuku.weebly.com/uploads/1/3/4/5/134593614/vodetipexepe-vemivoraxop-mulanugune.pdf
    • http://nakotigolajeg.scienceontheweb.net/rububezetorojifuwaxelu.pdf
    • http://palikexifumalam.mywebcommunity.org/what_is_planning_in_construction_industry_authority_of_the_philippines.pdf
    • https://gigemapafinul.weebly.com/uploads/1/3/1/3/131398374/vazuko.pdf
    • https://static.s123-cdn-static.com/uploads/4424645/normal_6002e0ad31b08.pdf
    • http://gexomafe.mypressonline.com/xavixed.pdf
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc5cd906953c.pdf
    • https://cdn-cms.f-static.net/uploads/4410204/normal_6036d5feb5662.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_005db5d784df4ec293fa2b5e74962700.pdf?index=true
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_29b6fd3918874c7abd8df2244e1e74f8.pdf?index=true
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_399d953090634810ae4f398500140cd2.pdf?index=true
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_bf3389cc60334e40a1ebf45c7e6b8bb2.pdf?index=true
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_0ef79f1eb64a47afa373d5ec465be897.pdf?index=true
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_1174a91c301f45e18d46c66431f86534.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66d.bin
3ce0c3f25bcf6b99e3cf35e03b78210ec78003417fc0b7ffeec6a0d31caea2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 5764 bytes
font_01_sfnt_off0000f9e4.bin
92beef14b2368429b0522cd4b1a20c5d6c006231f6070e726831788fc8e2dcb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E4 10760 bytes

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