Malicious PDF — malware analysis report

Static analysis result for SHA-256 cffe846cc2017847…

MALICIOUS

PDF

144.5 KB Created: 2021-03-21 21:14:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a6e0e74377142b8919effc20b428ac59 SHA-1: b94f59566566af9e883c698c35e3f23d6fbb2c54 SHA-256: cffe846cc2017847c098e45222f60d098c725533d7791deb56afaeae786c6211
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=ffxii+cartographer+trophy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419195/normal_600b20e24f3af.pdfIn PDF document text
    • http://videohost.space/899565410693onlp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_601f92a74c511.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373264/normal_5ff199b1d66fe.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/fibux.pdfIn PDF document text
    • http://kefets.xyz/why_does_my_transmission_leak_fluid92gra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418970/normal_5fc59977997b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467910/normal_603430c3434a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_5ffed195863fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391009/normal_6041896bef7a9.pdfIn PDF document text
    • http://mp4.design/94101019713v6xu7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419205/normal_603d4a6514741.pdfIn PDF document text
    • http://mawifit.iblogger.org/fases_del_edema_agudo_pulmonar.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://s3.amazonaws.com/satudifin/hansgrohe_kitchen_faucet_replacement_hose.pdfIn PDF document text
    • http://risufonexozamaw.epizy.com/86281516035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8241f2e-ae48-4567-8016-b0da605216e9/17989155596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4a0bc9-525e-497c-abb7-8a0987d79250/how_to_read_a_depth_finder.pdfIn PDF document text
    • http://wusumuforibit.epizy.com/8233100895.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/81872463614.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/fidexav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED1E 5108 bytes
SHA-256: 29a375c413ffcb73c5aedeaa889dd94ea042414dab5e657a3810766c3c8dc723
font_01_sfnt_off0001fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE9F 11652 bytes
SHA-256: e46ebba09bcb2d14d13105f1d2a10720f44d0328eb942eeee287a2b0358acd3e
font_02_sfnt_off000225f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x225F1 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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