Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e0562f9ea58e3d…

MALICIOUS

PDF

75.8 KB Created: 2021-03-06 21:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aa4061092a24f8921d594e8b9d44956e SHA-1: 578d95bda8546eceb16a4f048eed68b2e4a0d7ba SHA-256: d4e0562f9ea58e3dd66ad02d403fb80a2a5d4a1b88236784f9b32c588ec9a3ad
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 0.9991

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://nipisod.ru/strik?utm_term=adt+key+fob+battery PDF link annotation
    • https://cdn.sqhk.co/tipefimex/dhdghs5/zesawebifabovizi.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/hjjh9bu/67767245427.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/fhicyhc/nufevusuzavegod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_5fe7ca9a3f5ce.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/hd78kie/holy_city_chic_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/takejirasomu/hiGhggd/cooking_fruity_ice_cream.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_6011e846972c2.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/TieihUC/world_war_2_alternate_history_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470224/normal_5fd7091b37270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_601401e8d6386.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/iihcWgg/why_put_hashtags_on_facebook_posts.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/nomenclature_of_stereoisomers.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwosexed/0pgjidw/detentionaire_characters_names.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471484/normal_5ffdab1700703.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budezeja.rf.gd/sai_amritwani_video_song.pdfIn PDF document text
    • http://fevenubonanez.rf.gd/rinulipa.pdfIn PDF document text
    • http://nuzetewadan.epizy.com/twin_platform_bed_with_storage_and_headboard.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/ronekiponubesejetefiji.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/the_kavanaugh_report_montessori.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/shapes_of_molecules_chemistry_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/ruxar.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/rebadudetimibekamodo.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/kuveze.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/73678391790.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/metal_slug_infinity_pvp_guide.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_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 4984 bytes
SHA-256: e867c53f09a4666fb0f1e433c0c84b23186692b6ef947f4206858598c1acd8c5
font_01_sfnt_off0000fbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE3 10724 bytes
SHA-256: 21d9d2cee432f28a536bc6b8eabae907a013d833dd361730ac98f629d8fd3d06

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