Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcc37014c28ea67…

MALICIOUS

PDF

71.4 KB Created: 2021-03-21 23:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5f16cedde2a8030a079283fd105d7f5d SHA-1: ea5665dd5f59f4a33b2322391acecbc91b374de7 SHA-256: 1fcc37014c28ea67f5a38c8e0e38e2887ee6be9e83b60832ab32b44e9b8411b5
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, a technique often used for SEO manipulation or to redirect users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=a+raisin+in+the+sun+study+guide+questions+and+answers+act+1+scene+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473619/normal_5fe91f28318bb.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/fhjjaev/assassin_s_creed_valhalla_wallpaper_1366x768.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/sYWOgjl/90290869475.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449405/normal_5fce8ec53ed13.pdfIn PDF document text
    • https://cdn.sqhk.co/tasokuxu/VhcjdMz/sanagelimuni.pdfIn PDF document text
    • https://cdn.sqhk.co/vusanutoj/Gaojcie/download_gangstar_crime_city_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/cjhGMFH/pejojezovabekajap.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/5gdJxhr/panabipatewoveguwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_600aab830ed7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_602933eaa3f57.pdfIn PDF document text
    • https://cdn.sqhk.co/wevexifimur/jgs2Ihf/vasururunazikojidulusu.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/igiLcHj/windows_media_center_fm_radio_tuner_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254a6a59-343e-4b7e-907c-c4819e171fff.filesusr.com/ugd/decf6f_ab5b239bfc464569a02be42020aff6e4.pdf?index=trueIn PDF document text
    • https://f48d4657-0741-4d03-86fb-270e41f4932c.filesusr.com/ugd/6166c9_19928ef180a447ada39b4a9f0e476209.pdf?index=trueIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_f2142f5ec7344bc19c03a92b0a6b89d5.pdf?index=trueIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_7420559b4c844737994d9a94241541d2.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_a0fe00a0d3274384bc2ac417f37b10b3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e95eeb0-7199-4599-9675-284a533d9d43/22786376317.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_c0f170f48055402c827f023067e6fd44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e33600-7917-4419-a410-45d4d3af1b26/bofipufom.pdfIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_a5a2a6c62b77444cada2c8994082e88b.pdf?index=trueIn 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_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5664 bytes
SHA-256: 0b823cae97434cedcbf25bcac08f75790f6100dcbc885a993b3c71b141a690b2
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 9712 bytes
SHA-256: fbf8ffa52fd99fe32baafea325be62b7d40340f4d6835798b97ddb9f3fafd092