Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c594314aecd3f75…

MALICIOUS

PDF

92.1 KB Created: 2021-05-03 03:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dbf06d4a4dc590cadf86eaca8db91ddd SHA-1: ca19a6b8ec5ec504d03ffba8e167227c93e46188 SHA-256: 7c594314aecd3f75a4d4b4c10fc43ace1afd1eb30505648858a227183d84d10a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

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=are+costco+protein+shakes+healthy PDF link annotation
    • https://penizamuravepu.weebly.com/uploads/1/3/5/9/135976181/mibupuviwa.pdfIn PDF document text
    • https://lexeparuma.weebly.com/uploads/1/3/1/3/131380616/dafevuxotewar.pdfIn PDF document text
    • http://jarobadut.22web.org/xumavakaritevizawefawu.pdfIn PDF document text
    • http://br1.red/petit_prince_rose_renardvu0fo.pdfIn PDF document text
    • http://xejubevaj.22web.org/university_of_cape_town_undergraduate_prospectus_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/Kupid5s/teacher_interview_talking_points.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/fidDgeV/gameboy_games_nintendo_switch_online.pdfIn PDF document text
    • https://mikexilip.weebly.com/uploads/1/3/4/8/134868220/bidusu.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/f5ijhjD/16113699908.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/lumuga.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/dyCghgf/world_war_2_battlefields_today.pdfIn PDF document text
    • http://guwadoraji.22web.org/how_is_the_economy_in_cuba.pdfIn PDF document text
    • http://fawanajaxape.22web.org/california_real_estate_license_exam_prep.pdfIn PDF document text
    • https://cdn.sqhk.co/zufutetuwume/icgh0nQ/fevanufazikuvifekatoj.pdfIn PDF document text
    • http://vilopeg.xyz/fisizonofifokit7kc3.pdfIn PDF document text
    • http://wide-mean.top/josabuw8046m.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/f92aeb30-3702-4726-a669-2dbab1c6f1f0/samsung_smart_tv_50_inch_6_series.pdfIn PDF document text
    • http://lipidusixul.rf.gd/96510821618.pdfIn PDF document text
    • http://kemeterotef.rf.gd/vukexudevabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/094aecfe-5dbb-4821-9c97-bdac1d64d43e/77566379223.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11764 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off00012758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12758 5176 bytes
SHA-256: 375f45c769d3a742e0e2d0cb5e62b9a9fdbdb33587b35946b923cc25dd73cdfb
font_02_sfnt_off000138f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F4 12128 bytes
SHA-256: cd9d350c4b67f6bda237f96275fe0f3bd52d3dc5a2e17626543611de117dd7cf