Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82b5acde1bb5044…

MALICIOUS

PDF

76.6 KB Created: 2021-03-07 10:05:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6d5d95c8b69134b4c0da780b98cda1e4 SHA-1: f842c17dcd98d81c8a252585ea33ab4f6abf8e39 SHA-256: b82b5acde1bb5044f78544265de00d3ac9893e7a320929641ec582fd718533b9
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-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://pelibifir.ru/aws?utm_term=the+art+of+racing+in+the+rain+original+book+cover PDF link annotation
    • https://cdn.sqhk.co/meparifemoji/fzbFidr/zonuvaxa.pdfIn PDF document text
    • http://afterdealer.pro/94763684895mxwsl.pdfIn PDF document text
    • http://mx50off.info/how_do_i_start_a_ketogenic_diet_for_freeqxvvo.pdfIn PDF document text
    • http://hackins.site/rome_total_war_2_campaign_map_tutorialnwzxn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_5fe0853c8ece1.pdfIn PDF document text
    • http://lotiruwibek.iblogger.org/wajatebutumeseguvirumiwa.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/iyigEjc/space_wars_movie_netflix.pdfIn PDF document text
    • http://lnstagramverifiedbadgeservice.com/66533948362o19oy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444856/normal_60264bdae5527.pdfIn PDF document text
    • http://siondez.ru/what_is_a_breach_of_trust_in_contract_laww3ue1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_600470a4d936a.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/Yidheic/vozoretojuzekipagosinuraz.pdfIn PDF document text
    • http://nat-yoga.space/57984447307ynyrx.pdfIn PDF document text
    • http://tradebot.space/53164305850v1aeo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a40ee8-4936-424b-a9d8-3c29f3e06a1f/how_to_reset_radio_code_honda_fit.pdfIn PDF document text
    • http://tuwelifijija.rf.gd/telugu_movies_2018_tamilrockers_mahanati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e88516-e3fd-4a09-a37e-54699456df25/bexig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46d034e-8df9-4ade-a579-0e5fe5c4d3f5/kilaposipebubode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8cda8d-03c9-458f-8256-c0af032b7069/39438263050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040f85aa-db05-4d4e-a70f-3a2c656c1cc6/how_to_tell_if_furnace_filter_is_dirty.pdfIn PDF document text
    • http://lififisemevuko.rf.gd/blood_bowl_2_skaven_starting_roster.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_off0000ef2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2E 5180 bytes
SHA-256: 50e48e1f5d343350808d25b7ad5243ba8d72a615a4c151373738056803603452
font_01_sfnt_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 10476 bytes
SHA-256: d4c7aa6a983ae740ca0d549278c773e1eed1f546d615429aa418400175e03f11

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