Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c15771b68554eb8…

MALICIOUS

PDF

95.8 KB Created: 2021-03-17 19:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34fc241aecad7e172b7888697e1cc587 SHA-1: b44af1021b08c16e01a6295c6c65b11a68aa3f3f SHA-256: 1c15771b68554eb8e4837fb7e10d7ebd9c31c25671d160a8352a1c98d0793d54
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external URLs, with one specifically pointing to a "burger king menu" lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a high volume of outbound links, many hosted on disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/123?utm_term=burger+king+menu+cape+town+pdf PDF link annotation
    • https://biwakegexenulu.weebly.com/uploads/1/3/4/4/134437141/tovabuwix_nununejunozara_sogap_lizukireda.pdfIn PDF document text
    • http://meletemobu.iblogger.org/basic_computer_exercises_for_beginners.pdfIn PDF document text
    • https://kovorugoza.weebly.com/uploads/1/3/1/3/131383314/kotixiniteneneg.pdfIn PDF document text
    • http://koruzerukin.iblogger.org/guduwerupowodinijovamuwir.pdfIn PDF document text
    • http://ditumen.22web.org/what_is_pr_definition.pdfIn PDF document text
    • http://vunekopewode.22web.org/attitude_and_values_in_organisational_behaviour.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujomux.rf.gd/85097506683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1654119-6662-474c-8a08-ccfdfa7e1c80/88684229783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a93aa9f-7e6e-49c1-88a4-be20ee39c466/hamlet_shakespeare_act_5_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d41e97b-87b4-4fbd-ad09-941605160c60/tribal_leadership_by_dave_logan.pdfIn PDF document text
    • https://edb7bb8d-792a-4213-93ec-7f573d37cc74.filesusr.com/ugd/bfd504_0e7adb581bb047448dd8b19ff8476558.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80cd6ee-b559-4fba-a4d6-2fc445cdc793/baofeng_uv-5r_extended_battery.pdfIn PDF document text
    • https://506b1e36-fde4-4d44-8f84-dd746f9ef7cb.filesusr.com/ugd/e2f197_9ee154144e6e428a913e88f181acca4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bfd86a-0298-41a5-a00d-63868d2758b8/warrior_cats_film_trailer_deutsch.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_7372391836634c039cc984428069c6c3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d81b727-d04c-4169-9424-282a18c289fa/why_does_my_summer_baby_monitor_beep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555d82ff-67cf-493b-bc35-e5484f7c6d37/how_to_reset_ranger_american_security_system.pdfIn PDF document text
    • http://jikudifotiwobij.epizy.com/wsjt-x_2.4_download.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_f83c64dca58945a8a469cae5f126b8c1.pdf?index=trueIn PDF document text
    • http://zupukafejobe.rf.gd/corbettmaths_simultaneous_equations_linear_and_nonlinear_answers.pdfIn PDF document text
    • http://jizonizop.rf.gd/south_movie_2019_mp4_hd.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_6ed541c2a70f4ca9a1091f197aff7993.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a63287f-8013-48df-a0ed-cef1ecec659f/how_to_lay_swiftlock_laminate_flooring.pdfIn PDF document text
    • http://pelatutokutemi.epizy.com/81313921870.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_off00011cad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CAD 5472 bytes
SHA-256: 4b749d232b803ddad2e943548ecb2f131a429b7e3fd8ac546a59cf5427f38119
font_01_sfnt_off00012f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 12796 bytes
SHA-256: 7fcd79c340f1c3c7489b1d5f954aeadeaa74e39b3576bcc2262ccae079906d42
font_02_sfnt_off000159e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E2 16204 bytes
SHA-256: 83b0f3ed90e545d6d36d14a1982d3fe7024877db6cf476e622725167f7eecf28