Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf0bed1a477f2ed…

MALICIOUS

PDF

99.1 KB Created: 2021-03-29 02:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a8852f130207890b16d51c689d80a396 SHA-1: ae8d5e62af7e79eea4413fef7bec87df3218d7a5 SHA-256: 3cf0bed1a477f2ed552b9bfb86ba7d780a01ecc005351ad94d9f51b69f30267c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://zajinet.ru/award?keyword=a+computational+approach+to+edge+detection+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5fe530a32bd9c.pdfIn PDF document text
    • https://visumosibe.weebly.com/uploads/1/3/0/8/130814065/mikuxikapew.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/45610772509.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/html_css_js_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/blotting_paper_face_sheets.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/4dd5777.pdfIn PDF document text
    • https://rodagekutav.weebly.com/uploads/1/3/5/3/135313742/9893539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_603ed49779c01.pdfIn PDF document text
    • http://muriwilosakud.iblogger.org/39401552193.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/how_many_thermostats_does_a_2013_dodge_avenger_have.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_601eaa7b54aaf.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/ramugurolivukurudusober.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_605010fe9df46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_60462fb23c5b9.pdfIn PDF document text
    • https://wimelavejitovuv.weebly.com/uploads/1/3/4/5/134597731/fejesarelolerevufek.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/wuvusa_lirelotixipomod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b8b7ac6c-743d-4d61-b352-d2014f3261df/what_is_h6_error_in_gree_ac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0daaf67-0835-42c2-8be4-faab32d0ca92/97397578381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6affd9e-6f4c-49f5-b457-e9d16ac3d9b0/20554492891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d35ce8-dc24-4af1-be0e-004c6ca4423f/76215220910.pdfIn PDF document text
    • http://nizexududitew.epizy.com/xexalafaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906e0934-0afb-4a8f-8fd7-c096b086cd43/how_to_write_a_simple_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1210abba-6a69-4b1d-9720-64ef0cf4f78f/mixupupefelarotiruzox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a91eb4-27b5-4e1b-9846-88f8f17fcbb9/gegodinubolazape.pdfIn PDF document text
    • http://terekeduwowe.rf.gd/panasonic_cf-53_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d843d7e0-f090-4add-b22c-895f9675b397/729347191.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 5260 bytes
SHA-256: 6140062f3e0d0da57b971f40ff1653a2c1d6aa6eb6564c7f4a0985d6e9c03f37
font_01_sfnt_off00012f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7A 12284 bytes
SHA-256: 66f4957c47f05af1bf410996b2d69a4c2219d6f3e0173410dfc55a4bd9acd54d
font_02_sfnt_off000158fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158FD 16116 bytes
SHA-256: 16ec8717e79109bdf41b84b2d95e1e14a4025ba571ded87f7fafd23da5100dd2
font_03_sfnt_off00016ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DDF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3