Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbe62ea34207bd9…

MALICIOUS

PDF

86.5 KB Created: 2021-03-03 15:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4c6555d7c47c1332860219b9e2f7b9eb SHA-1: 38867d6893d7b85423527a6c70523dc0f497135d SHA-256: dbbe62ea34207bd92ad9b3aff3f150e366ba00b9c98dac77d2549807c7071abc
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. The embedded URL `https://vilenefex.ru/strik?utm_term=what+is+the+line+for+presidential+succession` suggests a lure related to presidential succession, likely to drive traffic to malicious or ad-heavy sites. ClamAV and ML classifiers also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/strik?utm_term=what+is+the+line+for+presidential+succession PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496571/normal_5fdbc63286ea3.pdfIn PDF document text
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/rejurumip_romazi.pdfIn PDF document text
    • http://beautysale.site/plotting_points_4_quadrants_worksheetcrtjy.pdfIn PDF document text
    • https://rasafidi.weebly.com/uploads/1/3/0/7/130776861/7326642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489587/normal_603c1c480d33b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5fee4bc5c6d65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_5fd39993477cd.pdfIn PDF document text
    • https://pozategon.weebly.com/uploads/1/3/2/6/132695347/5814806.pdfIn PDF document text
    • http://eslife.pro/how_to_use_uppababy_rumble_seat7f049.pdfIn PDF document text
    • http://prizinsta365.online/online_quran_with_tajweed_color_codedbh96l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_601a3e5d8df3e.pdfIn PDF document text
    • https://dupemokuko.weebly.com/uploads/1/3/4/7/134759865/2878711.pdfIn PDF document text
    • https://wuliwedifa.weebly.com/uploads/1/3/4/7/134753749/sasuvimo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457881/normal_5fced49021876.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_601dae4e5837a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378604/normal_5fe7285a65c19.pdfIn PDF document text
    • http://dimax-matrasy.ru/42455297591l9jup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418570/normal_5fc7aab199273.pdfIn PDF document text
    • http://eliyalte.com/first_aid_usmle_step_1_2019bp0fc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemazuwijenuxan.rf.gd/good_vs_better_vs_best.pdfIn PDF document text
    • http://rovututuxopi.epizy.com/41187885834.pdfIn PDF document text
    • http://girifej.epizy.com/because_he_lives_piano_chords.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 5256 bytes
SHA-256: 6fa57ccfa5b2209cd5532ab01a1c3e778dee7c9c534321bfd927bd1a880e03dd
font_01_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 10764 bytes
SHA-256: 6e2e9942d00fda6488b57998a27f79500ff968edf93a9c4db2d45347d5afdcf7
font_02_sfnt_off00013622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13622 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15