Malicious PDF — malware analysis report

Static analysis result for SHA-256 700e9580e6c17848…

MALICIOUS

PDF

74.5 KB Created: 2021-03-11 02:16:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b16fce4211948e9c080e6d2c73557c4 SHA-1: 22c261b705b15996420a3251f31fc101d4992fbf SHA-256: 700e9580e6c17848aaf012db63a760dbf216c7eba35c608abffe838e58972a09
156 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution campaign, evidenced by the PDF_SEO_LINK_FARM heuristic which detected a mass of external links. The primary malicious URL identified is https://xezojetit.ru/strik. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/strik?utm_term=presto+food+dehydrator+06309+manual
    • https://cdn.sqhk.co/janonaset/ZDHijQt/twisted_metal_3_primeval.pdf
    • https://cdn.sqhk.co/xixujipum/hH854ED/tornado_bus_jefferson.pdf
    • https://cdn-cms.f-static.net/uploads/4382618/normal_601a051ab6cab.pdf
    • https://cdn-cms.f-static.net/uploads/4477137/normal_602bf625dcb67.pdf
    • https://cdn.sqhk.co/resozasevej/cvhdgdc/bell_bottom_jeans_70s.pdf
    • https://cdn-cms.f-static.net/uploads/4478670/normal_603566ee9b78f.pdf
    • https://cdn.sqhk.co/tejilunuf/Qjghehc/cozmo_and_vector_play_together.pdf
    • https://cdn.sqhk.co/turanexode/id5gfuj/politics_for_dummies_online.pdf
    • https://static.s123-cdn-static.com/uploads/4473031/normal_6005a1e200a96.pdf
    • http://tofotibuwul.sportsontheweb.net/74524018048.pdf
    • https://cdn.sqhk.co/rutesawir/jjjgigf/metronome_rhythm_trainer.pdf
    • http://fidofawi.medianewsonline.com/4460106708.pdf
    • https://cdn-cms.f-static.net/uploads/4473926/normal_602fb7932eee0.pdf
    • https://cdn.sqhk.co/befozaxulot/l3gfogc/dikopidelixi.pdf
    • https://cdn.sqhk.co/zovitamojim/pkjamjp/promo_code_for_walmart_delivery_service.pdf
    • https://cdn.sqhk.co/xogovofofi/0P3zEXJ/good_quotes_for_facebook_post.pdf
    • https://cdn.sqhk.co/bitowiso/1giwVO3/sewez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_5e46c86f83e14db3a67ceb3fd8828b4d.pdf?index=true
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_310d7e5516994d3f974d4d2abf260ad3.pdf?index=true
    • http://nononulavojiki.myartsonline.com/how_do_covalent_bonds_work.pdf
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_df6c29487348449e990b7c7b34e97146.pdf?index=true
    • 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_off0000e324.bin
b6cf0199a87bb8ba6e263ba310355083a1c0c0596302ae8849e00b7bcffaf452		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 5864 bytes
font_01_sfnt_off0000f6e5.bin
b1080d27cb4b2cc0a87804a50d8dab7556b02359d3036ba49b6f16c113bc3030		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 11088 bytes

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