Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc53a2d6976f86d…

MALICIOUS

PDF

91.3 KB Created: 2021-05-05 21:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1bc6c764901456008c2e0fba61d8da90 SHA-1: 26e6530d4709835de5b126f5a99f75ae0c9190d6 SHA-256: ccc53a2d6976f86d588ea14b80b96f1e2ba7d693c826241be787313e98fe4a82
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the link farm heuristic suggest the document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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/strik?utm_term=check+your+understanding+answers+anatomy+and+physiology PDF link annotation
    • https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/datogidut.pdfIn PDF document text
    • http://pojoxigi.iblogger.org/64460233832.pdfIn PDF document text
    • https://wuvekodufunat.weebly.com/uploads/1/3/5/2/135298648/guxigokonafafof.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/venopodeket-roluneruvoni-niribesipavet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464710/normal_605f8117c1085.pdfIn PDF document text
    • https://cdn.sqhk.co/ketixudolu/idjhhiV/75920520397.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426690/normal_6006e72e8228e.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/hfjhgjQ/65962857799.pdfIn PDF document text
    • https://pekubitox.weebly.com/uploads/1/3/4/4/134477952/zafisafulug-fitelenaguj-xusezuji-tilekori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_60384bc51bace.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/c0a811e2-7f25-419a-a56e-9238f0cc84c0/the_natural_book_ending.pdfIn PDF document text
    • http://jefokilekik.rf.gd/19684809601.pdfIn PDF document text
    • http://tosivasode.epizy.com/roniwesebejegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919ff82e-373d-4b8b-8aa3-3b5d5a1d1e96/tupite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d4114a-bb17-4940-997b-2f2988913f6d/how_to_pair_directv_remote_with_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0c825f-de44-4525-ac63-4965a4a7cafb/bowflex_xtreme_2_best_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4de1fda-a6c2-45da-885b-98bbebecbb76/zadivivemoto.pdfIn PDF document text
    • http://dozokefonusabo.rf.gd/android_setbackgroundcolor_color_resource.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d1acca-4e40-4f36-b488-8aeae3eb1cfa/9621199375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453d6448-f879-4515-ae23-c388e37122c2/rexetogap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec9bc5d-4809-4e50-8015-3cf37a288eaa/jatisitijufuzasuxex.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_off00012731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12731 5652 bytes
SHA-256: 71fd546b9be376aaf448df91bd00de40c31831fd92560fbf6c58eb26249f5753
font_01_sfnt_off00013a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A5D 11020 bytes
SHA-256: 1310c0355335f9d2f1f932df852ecdc5cf3aea9ac1aaf26c4474527092110d58