Malicious PDF — malware analysis report

Static analysis result for SHA-256 6200b8135a9df3a8…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 23:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 96e5b4c5c478e0963bd12c9ead621fef SHA-1: 94375e1ca12fdc446f5e36f0dc0ea6c528c6b637 SHA-256: 6200b8135a9df3a837443072d9288afcf719cd29931c128eb4e23b67e808309e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, suggesting a lure for downloading further payloads.

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://xezojetit.ru/award?keyword=british+english+conversation+practice+pdf PDF link annotation
    • http://sodahq.club/1997_club_car_repair_manual_free_download8p19r.pdfIn PDF document text
    • http://3203epworthcres.com/presto_granpappy_electric_deep_fryer_reviewsb40vz.pdfIn PDF document text
    • http://uscarinsurance.info/fuwodudupezenasofull6gku.pdfIn PDF document text
    • http://003-center.ru/72689263320bzhq1.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/98801401096.pdfIn PDF document text
    • http://tabikola.online/diary_of_wimpy_kid_book_collectionwwzk7.pdfIn PDF document text
    • http://rodina38.ru/labozexaxm4tf.pdfIn PDF document text
    • http://ultra0.space/479105183398nd91.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/active_and_passive_voice_definition.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://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_c9bb86ae8e65496885532558721d3464.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0714506-146f-4a46-b787-fa86aeab311b/wendy_nutrition_best_choices.pdfIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_ecc958d980d342e9b913eacd4a4b715f.pdf?index=trueIn PDF document text
    • https://3c199e1c-ff83-4553-a351-db1e9419129c.filesusr.com/ugd/424a74_5f02ff2a844c4b79a38f7c64ea1b5b3f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b95330-eb0d-4693-8a7c-7675cd0da2fb/22400361833.pdfIn PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_098d297d2ee044e0b6ea6aa4e1f3fbf3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33e2b274-3157-41ae-957f-0637846bfe74/wijabewupanovipugamone.pdfIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_87a209a47b784c989e44007529c2e657.pdf?index=trueIn 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_off0000e85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85E 5312 bytes
SHA-256: 7e18f358e1e35295b08644c08a1d97ead0aae70f3e4049b3d1b3819931e1712f
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 10592 bytes
SHA-256: 79615b225ac69ac16dea2e0e82deb1ec4ef26615e95a9c7a243105dd9ba0f78d
font_02_sfnt_off00011ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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