Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4f6c2f3cf783aa…

MALICIOUS

PDF

78.3 KB Created: 2021-03-13 16:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: abc5974474a8410fe06aa71dc7626fa0 SHA-1: 3ba416892b4aad276c751e76f311183114a3456a SHA-256: 0b4f6c2f3cf783aa6b98074f4b4dd038e456c10f7dc45047923a30ca52df6e0a
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://botokaw.ru/strik?utm_term=how+to+remove+cover+from+first+alert+smoke+detector PDF link annotation
    • https://damitonamusu.weebly.com/uploads/1/3/4/3/134306925/basusajowowoxan-depobikukuvafax.pdfIn PDF document text
    • http://xigosilefonaboj.iblogger.org/android_canvas_rotate_rectangle.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/ue6Crii/hmrc_cumbernauld_corporation_tax_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/UgjvtpF/1859175813.pdfIn PDF document text
    • https://cdn.sqhk.co/totudavomud/giKgjc5/65562930216.pdfIn PDF document text
    • https://biruwilajefi.weebly.com/uploads/1/3/4/6/134651793/zosibikeve.pdfIn PDF document text
    • https://cdn.sqhk.co/tafolaku/njagdmb/fan_fnaf_games_on_scratch.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/ghf0hTi/kamirazasusakikil.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/Vigsdgg/44863755433.pdfIn PDF document text
    • http://jovekasad.iblogger.org/22223554215.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/nakixawozolalud.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/mubefula/98141284130.pdfIn PDF document text
    • http://zobawukesilebaf.epizy.com/properties_of_adjoint_matrices.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/bal_ganesh_tamil_full_movie_free.pdfIn PDF document text
    • http://falojogume.rf.gd/49448620424.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/13903663130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d334b8-5e91-4507-9e8d-a7edc4706a34/what_compares_or_shows_the_relationship_between_two_quantities.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/51743315830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081aeccf-038c-46a6-93fb-cda1fbb899d7/vamizixa.pdfIn PDF document text
    • http://xezeruv.epizy.com/8457280172.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f36e759-4039-4b8b-8447-954617f71507/nepamebijolelebazogomox.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/12419745015.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_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 5344 bytes
SHA-256: 41fef2083d4cf1912ab30ec204e91b7be546c14b77f85f2dbcdd5ea2615daa80
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10916 bytes
SHA-256: 9133df92e0fcff7bc2b86c318a69f8d80f08b89b36cdcae347be2612991d1809

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