Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96d8d8c25445667…

MALICIOUS

PDF

76.9 KB Created: 2021-06-02 02:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a671c0c6215e251b8dd85f40f9a05acb SHA-1: 10a00b99120e7f11e8edf2a8471535184c3b65da SHA-256: c96d8d8c25445667323f803b670462873e24864e9b90d7f7a285dce98512f989
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://gimoguvi.ru/123?utm_term=font+awesome+version+4.+7+cheatsheet PDF link annotation
    • https://jozudepixivi.weebly.com/uploads/1/3/4/6/134682498/zefoxulabexuxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_602ce81a571ee.pdfIn PDF document text
    • https://wiwofuda.weebly.com/uploads/1/3/2/3/132303082/8457927.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_5fe973e67c859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_6052774ee4ea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_60620ae0a2688.pdfIn PDF document text
    • https://jolaxedepodoz.weebly.com/uploads/1/3/4/7/134708869/wusomamil-witebujibugi-jujiroriboli-sanelazuna.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408990/normal_6025572c9026d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380700/normal_606254c84355d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_602bff1acd35a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449769/normal_5ffe47e172933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444885/normal_5fcc90e3801d8.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/dfe2828fcd4dc6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444370/normal_6024aab14738d.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/3406337.pdfIn PDF document text
    • https://fontawesomeIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/844b91d1-d99c-4fcb-82e7-c42c3a6495d7/2005_chevy_trailblazer_service_4wd_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586fa515-912b-40ab-a659-193265276380/26345972363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e39b3b-1cf0-47bd-b200-67c4c5917db9/appliance_repair_green_bay_wi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddad8bb4-450c-4240-aa36-7498d276c32a/konedumetefuzogud.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 5312 bytes
SHA-256: 169c53f17d8351e18359cdece19b50956a02c4a84a4b520148aed9ab5a840fa6
font_01_sfnt_off000101e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E2 10740 bytes
SHA-256: 2d574403baeba3b90caff982a978885387c7fc093ba5b0ea8a62ecd816fc2217

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