Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9462573e3cfdf0b…

MALICIOUS

PDF

79.9 KB Created: 2021-03-25 18:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: af00cbbd317893a569dc8c2996e96ff1 SHA-1: f6d6d79dd5be3a23b99286e3c3201b97f81db632 SHA-256: e9462573e3cfdf0be1af0158eeebc26b3ceabd3362a2a06bcca9bf7be0c5c505
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://lozipotod.ru/123?utm_term=new+movies++app+name PDF link annotation
    • https://cdn.sqhk.co/sewoliwadumi/ia3bAxp/prank_call_wars_apk.pdfIn PDF document text
    • http://gunodopo.22web.org/12963602508.pdfIn PDF document text
    • https://cdn.sqhk.co/jilelemo/ichbTji/jimominexepisatumep.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/IEihjg3/73268290785.pdfIn PDF document text
    • https://ganipomadajo.weebly.com/uploads/1/3/2/6/132695424/4697791.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/niwutu_jozegitalimox.pdfIn PDF document text
    • https://faxigokoge.weebly.com/uploads/1/3/0/7/130775726/5c0603ab261973c.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/gi2idAv/air_force_pt_test_usaf_pt_calculator_walk.pdfIn PDF document text
    • https://mamudige.weebly.com/uploads/1/3/0/8/130874639/jonexu.pdfIn PDF document text
    • https://tejovobomogopiz.weebly.com/uploads/1/3/4/6/134626725/suzejinovabaxudof.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/gQhWHMz/accurate_altimeter_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/fid9Djb/multiplayer_word_games_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/hhKhajb/malawi_cichlids_care_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/mhhiAmM/soccer_international_champions_cup_results.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lupumik.rf.gd/integrated_marketing_campaign_template.pdfIn PDF document text
    • http://ruwiluleter.epizy.com/71334038264.pdfIn PDF document text
    • http://nolexaguluzu.epizy.com/xegijuda.pdfIn PDF document text
    • http://mutifesojare.epizy.com/riropevulusozilimag.pdfIn PDF document text
    • http://savagudalu.rf.gd/split_merge_windows_10.pdfIn PDF document text
    • http://pebabub.rf.gd/15481747361.pdfIn PDF document text
    • http://resizov.rf.gd/topographic_anatomy_atlas.pdfIn PDF document text
    • http://bukumetaboxalo.epizy.com/ib_history_extended_essay_guide.pdfIn PDF document text
    • http://xilavivugup.epizy.com/balancing_equations_practice_problems_and_answers.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_off0000fbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC2 4960 bytes
SHA-256: ab8d9ff94b7f05a489de21e16193a3eff6821b66c7b2d5c363d73ced8d8f9716
font_01_sfnt_off00010cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAC 11092 bytes
SHA-256: fab403c3814e915f85ed659a73ed516946c7cdbedfac057324c72cc2fbede290