Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb459e2d6c5344e9…

MALICIOUS

PDF

72.9 KB Created: 2021-03-16 18:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f16d27d65e4c43998ade3c3d2000007d SHA-1: 5bfe2b0aa8ae0bec08b980fdbe9ffa8fdec92a0d SHA-256: cb459e2d6c5344e98cb4bc97f8b175d1e0565f36a1d44e19f05ba35e9516a32a
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 0.9989

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://druttle.ru/strik?utm_term=film+review+template+tes PDF link annotation
    • http://interbankdigital.com/19683966764sgpow.pdfIn PDF document text
    • http://app-3null.com/57692211479ccfok.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/yjhjg46/super_sniper_game_play.pdfIn PDF document text
    • https://cdn.sqhk.co/mujetujojen/chhhghd/italian_bread_recipes.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/pgeifzL/brick_builder_lego_creator_3_in_1.pdfIn PDF document text
    • http://pixelbarista.com/66446669418z8oth.pdfIn PDF document text
    • https://cdn.sqhk.co/dirodivive/JLjihio/75571707289.pdfIn PDF document text
    • http://itfamily.info/72789267494twcv1.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/lukotolujejavjfzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_6036b293c81f1.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/hfSxidn/lemon_tree_defined.pdfIn PDF document text
    • http://keksik24.ru/tarovt3hyg.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/hgja4jj/katobezaniveruzab.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/dIiagcJ/11133725837.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414849/normal_60317cd05ced8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389107/normal_604147bf28375.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/bc5VOpX/minobopoloduxusa.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/g6t11t8/handbook_of_industrial_water_soluble_polymers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461485/normal_60485840b2a6a.pdfIn PDF document text
    • http://adanakebap.org/zarobufala97mz9.pdfIn PDF document text
    • http://idealslim-ordina.site/dewalt_miter_saw_stand_wheel_kitcow6u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zifozujiwi/what_is_the_theme_in_because_i_could_not_stop_for_death.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/xonomukipozos.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/android_studio_install_dart_plugin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 4644 bytes
SHA-256: 7af72cb0a687ba19c23a94b4e20e87ce9b4518d85abeb310a47e38f93300304c
font_01_sfnt_off0000e63e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63E 9940 bytes
SHA-256: e2d86197c001abf0ed1d2a8f9405400c2fa0985f01e5dba69a968ec6b110b247
font_02_sfnt_off0001080a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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