Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a02bee122d28f77…

MALICIOUS

PDF

75.6 KB Created: 2021-03-10 17:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63215b8c1f67aeb13e07a3a2ad542f97 SHA-1: 20eca9a8ab48dbfd6f17cf9d93fbfd2c47325d9e SHA-256: 0a02bee122d28f7796c9037456715b699d6723c818f117a623a5ff2ed48d25b4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with several pointing to disposable domains and acting as link farms, indicating a likely attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document's primary purpose is to host a large number of links for deceptive purposes.

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://botokaw.ru/123?utm_term=wkyc+dealboss+sheets
    • http://hookup157.fun/xmeye_setup_for_pc_windows_xpbfuti.pdf
    • https://cdn-cms.f-static.net/uploads/4460450/normal_60341fdd7eea1.pdf
    • http://sanatoriy-izumrudny.ru/kuzejuzaqn3nd.pdf
    • https://cdn.sqhk.co/mewedenemez/jjfjgx0/juwom.pdf
    • https://cdn-cms.f-static.net/uploads/4421210/normal_6027e6f98017d.pdf
    • https://cdn-cms.f-static.net/uploads/4473041/normal_6034010ab591c.pdf
    • http://rebelliona.online/abs_steel_vessel_rules_part_5_c_chapter_10pbxhp.pdf
    • http://bella24.xyz/gepupawetins9qwx.pdf
    • http://creditpm.com/nutrition_facts_dunkin_donuts_iced_coffeeddd7o.pdf
    • https://static.s123-cdn-static.com/uploads/4465277/normal_6009044d0f39e.pdf
    • https://cdn.sqhk.co/dasewugiru/cIFMkii/pamufakididimawakozegis.pdf
    • https://cdn.sqhk.co/mamevugixej/ijrhjim/shipwreck_cafe_empire_michigan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/suxuzubojut/achieve_3000_bill_of_rights_answers.pdf
    • https://uploads.strikinglycdn.com/files/58c2550e-4a8f-4771-853f-e1eb96d8fcb1/3d_drucker_anet_a6_vs_a8.pdf
    • https://uploads.strikinglycdn.com/files/cf99f95a-c4f5-4699-a2ca-6081ee0c53ff/39707131062.pdf
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_b9e6714bd4534fbe9c621e3cde1be31b.pdf?index=true
    • https://s3.amazonaws.com/gitipelut/assassin_s_creed_3_dlc_ps3.pdf
    • https://s3.amazonaws.com/xoguwavosuje/lumivarevewosun.pdf
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_57b091228f374c2f8c4115c5342db337.pdf?index=true
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_b69f6b243226492e917878326345152d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/90b38ba5-09f2-4bfb-af67-e51c9d9e9396/what_oil_to_use_in_cub_cadet_xt1.pdf
    • https://s3.amazonaws.com/pekatikisuruki/is_the_sp_404_worth_it.pdf
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_6afbafb0e4194dcf92ff8a2f7f75b2de.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_dba0ef378e124b94938da0c1f40136f8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3d254793-f5b3-49d1-9440-326145a4affc/fadorajiwirogaziwaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec53.bin
74c78bafa01b5f419afca2c564b7ba92a504997e23469c7337b408ad1419d713		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC53 5248 bytes
font_01_sfnt_off0000fe40.bin
4ec97786fed8393efba5624390d38dbdbcad1b7eb059444705da134297cdb36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 10272 bytes

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