Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f04b7c59c489f78…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 05:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 6c5ca4db39759ca26286803a3de79581 SHA-1: 99166d393d779fa2aae74521920bc9e1145365c3 SHA-256: 8f04b7c59c489f78ae483f7d1764b50f73171294788b197a9a60f7f9fa6f125b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=saint+vincent+de+paul+st+augustine+fl PDF link annotation
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/1eb27443266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477138/normal_5fd2af5c21f3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365660/normal_5fceb70d15508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420924/normal_6001ed8e7bc55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_600a09f10f09c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_60160d01f0d24.pdfIn PDF document text
    • https://riwivuzis.weebly.com/uploads/1/3/4/2/134265818/tudaxi.pdfIn PDF document text
    • http://xezojugudapele.iblogger.org/build_my_life_chords_in_g.pdfIn PDF document text
    • https://cdn.sqhk.co/tefupudoma/h7hicgg/furious_dragon_dragon_city.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jinuritubamo.rf.gd/sheetrock_mud_sprayer.pdfIn PDF document text
    • http://wavedada.epizy.com/beach_buggy_racing_hacked.pdfIn PDF document text
    • http://lexaxadodazab.rf.gd/pitopita.pdfIn PDF document text
    • http://bepafazo.epizy.com/the_copyeditors_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/23165213275.pdfIn PDF document text
    • http://wexugemo.epizy.com/bakagokob.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/amazing_stories_magazine.pdfIn PDF document text
    • http://wupuwijekoja.rf.gd/9859083289.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/7770220120.pdfIn PDF document text
    • http://zumaxupuvu.epizy.com/how_to_create_a_google_website_template.pdfIn PDF document text
    • http://fabupumow.epizy.com/certificate_format_psd.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_off0000d6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A4 5388 bytes
SHA-256: 390b9d34087f8e33c1b4be5b0ca3f66b54a2cc8ad5220d88a70d6f5c47cc4d6e
font_01_sfnt_off0000e91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91C 10280 bytes
SHA-256: 55f02c1f82ef571f07353313caaff770a23c84ea5ab2497d110f226f077c712e

Open this report in the interactive analyzer, or submit your own file for analysis.