Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7433f60a396b7f…

MALICIOUS

PDF

79.0 KB Created: 2021-03-22 00:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf1f8c2fe73716ee9c434a5c8726b8b2 SHA-1: df57423a8dc6c4ca6bebadef5443d171d7599333 SHA-256: eb7433f60a396b7f12e6fbc764622f58e261e72b9cc02aae3c45f7e856df82fd
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://botokaw.ru/wix?keyword=cold+stone+creamery+for+sale+in+va PDF link annotation
    • http://kenugizi.getenjoyment.net/quantum_field_theory_demystified_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/gicgiih/36735146626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_600dfc43c25e6.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/LgggdOh/dajotanoxabivuxepade.pdfIn PDF document text
    • https://cdn.sqhk.co/mumaxeje/gdiehcc/never_have_i_ever_netflix_show_age_rating.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_6056ef2b98394.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/Eqhf6if/tavemuwusaworujimidafo.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/3hfidQn/picture_collage_maker_for_pc_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_6032478f5aa3c.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/cygolite_hotshot_pro_150_usb_rechargeable_tail_lights.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/a4uTgha/fosowusokilujegapanoja.pdfIn PDF document text
    • https://cdn.sqhk.co/gesafafo/3biidif/zinageguzazosifazarelu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/43260845322.pdfIn PDF document text
    • http://rasunafosav.epizy.com/neligikexufigogivefu.pdfIn PDF document text
    • http://tomabev.rf.gd/rebelepuzawoxeta.pdfIn PDF document text
    • http://nojatajof.rf.gd/wujewerunelu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/bixidut.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/berwick_college_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/how_to_reset_health_meter_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/jason_capital_net_worth.pdfIn PDF document text
    • http://toguxekedufu.epizy.com/15669165537.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_off0000f38e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38E 5232 bytes
SHA-256: 48c09c805b90416abef48b4bb205f067f04ac8845b1b12d42d0aeaf4fdf25a1f
font_01_sfnt_off00010552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10552 11744 bytes
SHA-256: 6d97190a824213927f37e1cf361930379bd5f988515de311d2ef16f9976a35ce

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