Malicious PDF — malware analysis report

Static analysis result for SHA-256 0296393e13b0c0df…

MALICIOUS

PDF

84.8 KB Created: 2021-03-30 23:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 45ddbde40c7100e7ade959031f13b5a8 SHA-1: adfcafcdc8f032c2d4696b128e762936ae474e7b SHA-256: 0296393e13b0c0dfa0016e1570505d31dee5c9e5f741be2e84be3502711e6a2d
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 0.9998

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://dugedepap.ru/wix?keyword=physical+science+15.1+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428035/normal_5ff14247b6327.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369509/normal_5ff4bab0590b2.pdfIn PDF document text
    • http://sdek-24.cc/adler_barbour_cold_machine_dcm-128ec6z.pdfIn PDF document text
    • http://liko-sneakers.com/edgestar_wine_cooler_manuaload9o.pdfIn PDF document text
    • http://vukogosapejofa.iblogger.org/wafole.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/analysing_an_advertisement_worksheet.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/marine_boiler_water_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378379/normal_5fdd763ed996f.pdfIn PDF document text
    • http://cabinetshub.xyz/mamiya_rb67_pro_sd_motorized_backvgtat.pdfIn PDF document text
    • http://mkr-olimp.info/wufotaramivabejv8tde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_603fce4308c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392442/normal_5fd866e8ea3a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wexapunotuvegu.rf.gd/85957305192.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_fb6288df9c284bdab6f799e736cc40bf.pdf?index=trueIn PDF document text
    • http://rovizomaguwex.atwebpages.com/us_attorneys_office_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/how_do_i_contact_samsung_tech_support.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/kubakokodovubenirop.pdfIn PDF document text
    • http://gimukukuzape.epizy.com/mebizifiveporoxadezam.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/paxenowerisamolepojo.pdfIn PDF document text
    • https://576979ff-f939-4980-8793-4b7993fae0a8.filesusr.com/ugd/14903d_cf26b0245a3341a1bc6afef49374c1ba.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 5356 bytes
SHA-256: 8b0ff1e2e13e1d943aef575208743f4846abd10c59d8475ae038b2b3cbae505a
font_01_sfnt_off00011e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E22 11660 bytes
SHA-256: bdea0a2de2af1cf499dd0a56e7e40a36fc62711a9aaac10d8a530bfe0e1a6184

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