Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d5282a7311f061…

MALICIOUS

PDF

75.0 KB Created: 2021-03-11 10:48:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 89a6dbc5e1b4c7f76f29975c7ea40f00 SHA-1: af32140efabc4cf05d2a00dae1a46c5bf7a8e9ee SHA-256: f6d5282a7311f0610f486ed221b7e06225468c379918f8b50a40905b63bd6031
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware delivery attempt. It contains numerous embedded URLs, including one that directly references 'amnesty international death penalty pdf', suggesting a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of hosting multiple links on disposable domains, common in phishing campaigns.

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://kuzutuzo.ru/award?keyword=amnesty+international+death+penalty+pdf PDF link annotation
    • https://cdn.sqhk.co/mudifuto/ibNgeSe/79393070264.pdfIn PDF document text
    • https://cdn.sqhk.co/fufitefan/ajZ93hi/domibukulosozobus.pdfIn PDF document text
    • http://vovpomnim.ru/programma_free_per_scrivere_su_fileribvz.pdfIn PDF document text
    • http://lady-bug.club/sifawoledazuzud76cpa.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/ijUjie0/dead_trigger_2_pc_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/a2WQpcl/vetakivakiwajiduw.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/J1Sicgg/hmrc_penalty_payment_online.pdfIn PDF document text
    • https://cdn.sqhk.co/bobudozoke/zii71ke/52411242541.pdfIn PDF document text
    • https://cdn.sqhk.co/nosisatoved/fgjxWgj/free_digital_books_for_middle_school.pdfIn PDF document text
    • http://com-servers.online/jizokezimojurumatamikb4sp.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/hheigha/zuberopafatotuzudunej.pdfIn PDF document text
    • http://zdsshop.top/347446214235q3t4.pdfIn PDF document text
    • http://pixelbarista.com/soxodufafuxiginediwijavbo6y.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/gdgfFQU/31173849361.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/gfHLXja/zaduzinuvix.pdfIn PDF document text
    • http://byt-upak.ru/super_easy_crochet_hat_patterns_for_beginners7rpps.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/qiihfKX/fanutasunip.pdfIn PDF document text
    • http://kismyketio.com/battle_royale_coloring_books5xa2y.pdfIn PDF document text
    • http://momsmall.space/42890214263us1pf.pdfIn PDF document text
    • https://cdn.sqhk.co/tilekixu/IWhjxbb/dojefudududiwoxoru.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/3724439f-820c-4f02-a750-be2665ec55f7/36114732385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14d8126-9526-4a6c-98a2-53c8260a2218/catalina_3-in-1_convertible_crib_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c332f546-81c1-41d6-9ce0-7413c9d8e757/976077917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6931226-1222-4143-8bd9-208f86561d1e/52608284624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909f487e-0238-495f-bc7f-1f796c046157/los_rios_de_color_purpura_2_1080p_latino.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_off0000e876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 5372 bytes
SHA-256: 53ac86e7d589a1b6d1fef8c162c78c5114b4ccbdf62b054f8302287c418f1190
font_01_sfnt_off0000fa92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 10428 bytes
SHA-256: 4e234f39bc1f27f9f05e0b1932f4670bc1f820e23f3e7632735aa8992222d004

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