Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e301f1d255a7c81…

MALICIOUS

PDF

70.9 KB Created: 2021-03-28 05:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef824c81a74fbad138a5d8fc62ad4ada SHA-1: 7335572b6f4527958bdc0dc5f844a0b21fa150f6 SHA-256: 3e301f1d255a7c81573233758020c17ed864d05e68ed17c0da5b2de0674be63f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://ponafet.ru/wix?keyword=chapter+6+money+in+review+answers PDF link annotation
    • http://tatanip.medianewsonline.com/muvewomiguwor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421048/normal_6034ce3f5c205.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458124/normal_5fc98b0176000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fdc87038ae08.pdfIn PDF document text
    • http://vasazuruxu.iblogger.org/91364527459.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/faruviroxusow-xezotenis-pofafo.pdfIn PDF document text
    • https://nawawedivoxoni.weebly.com/uploads/1/3/4/7/134719505/629f0f2d4624da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_60499110cebeb.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/a_photographic_atlas_for_anatomy_and_physiology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389603/normal_6004da08e4c74.pdfIn PDF document text
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/gexudodapobur.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/24689532026.pdfIn 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/0d810d77-9814-4234-a787-c0e147ff61d3/how_to_wire_directv_satellite_dish.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_b18eff6637624488ba8af56fb2f33122.pdf?index=trueIn PDF document text
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_b637033db75c4cab97f69d26179e0b4f.pdf?index=trueIn PDF document text
    • http://xutenasejubibe.atwebpages.com/57836187374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3311885c-171c-4194-a7c7-ff9d4b6cd18b/nipelonifevasole.pdfIn PDF document text
    • http://kedogevakubonog.epizy.com/92116892899.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/riselolifarudesos.pdfIn PDF document text
    • http://pejonoma.epizy.com/electronics_and_instrumentation.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_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 5340 bytes
SHA-256: 0fa99820b1dbed67d750e11aa2f650e7c1e07cfd19162146b20832c5e3dc5d07
font_01_sfnt_off0000e811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE811 10604 bytes
SHA-256: 31a2aca7ca29437a76c9d9dad2a130bda356f75518cbc546e2efae9e615b0b91

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