Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a8610aed0b1a8f…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 04:34:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a805e9abd993837396f3d1bceac2b5e5 SHA-1: bd87aac38e6a0add4091a1c73ae9e2d08ee63c2e SHA-256: e2a8610aed0b1a8fae62e86416a15550cb9ca088f9f3d4a25b442f71d87da67a
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://vilenefex.ru/strik?utm_term=sabbath+children%2527s+story+ideas PDF link annotation
    • https://cdn.sqhk.co/rawegili/ihchcmN/limite_di_account_business_manager_instagram.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/1143840.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/gehfgdS/veruzozapugitiw.pdfIn PDF document text
    • http://moreprodukti.com/lakshmi_ashtothram_telugu9cry8.pdfIn PDF document text
    • http://djami.ru/how_to_write_a_script_for_television_dramass1xj.pdfIn PDF document text
    • https://zimekepipo.weebly.com/uploads/1/3/5/3/135351260/a21bc.pdfIn PDF document text
    • https://babejogoj.weebly.com/uploads/1/3/1/8/131856270/taravof_rabonoxojas.pdfIn PDF document text
    • http://shoop-fn.ru/xubefesovopubzm8if.pdfIn PDF document text
    • https://cdn.sqhk.co/sufajezugi/hejwOb5/kezos.pdfIn PDF document text
    • https://bidijogez.weebly.com/uploads/1/3/5/9/135993355/c57c59a3100b462.pdfIn PDF document text
    • http://helplnstagramcontact6088757.com/xuguxoxipasalncsla.pdfIn PDF document text
    • http://stnold.com/2008_ford_escape_hybrid_awd_mpgvzq1b.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/fadobirak/51277597247.pdfIn PDF document text
    • http://pikawin.rf.gd/batman_arkham_city_mods_ps3.pdfIn PDF document text
    • http://biwovake.rf.gd/zufeputapumoromawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5331e466-fb01-4464-87e6-71780894b274/the_standard_high_line_ice_skating.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1f6091d-cb1c-4a9f-8849-5a7c1431cd7e/graco_x7_vs_x17.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/bbc_hausa_audio.pdfIn PDF document text
    • http://xagewozutuke.epizy.com/social_media_development_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/b._ed_entrance_syllabus_2018.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_off0000eba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA0 5408 bytes
SHA-256: 153d66404d4c184bc948e21e3e9f33aa92c7af0f533cd349fbb3d7fe70b9e0d3
font_01_sfnt_off0000fdff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFF 11536 bytes
SHA-256: f5f6ca091f166e3ccfa5242d79090b1d0046807f5fcc2a5975108f687ac63bc9

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