Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b22c9a5c609c0f…

MALICIOUS

PDF

95.3 KB Created: 2021-03-25 03:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1062b3fb9b4adb34dec037f9f1b8b3c2 SHA-1: d7b6384ced95aa6fafc72285ce4cd021738594af SHA-256: b7b22c9a5c609c0fb09feae87f0510b859f5a759234eb4d36e189c99b74ba03a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The primary malicious URL identified is https://mezovuduw.ru/award?keyword=bsc+2nd+year+physics+books+pdf+free+download, which is likely the intended destination for users tricked into downloading the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/award?keyword=bsc+2nd+year+physics+books+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401732/normal_605ba02d64fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_6018496bba408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_600cb15db52c8.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/n11kigy/14429748002.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/jUzggKW/hill_climb_racing_2_best_car_to_upgrade.pdfIn PDF document text
    • http://bodyita.space/when_should_i_plant_tomatoes_in_texaskdtbu.pdfIn PDF document text
    • http://bbflowers.net/windrock_trail_mapnm0vn.pdfIn PDF document text
    • http://trastenmyqort.online/how_to_answer_teacher_interview_question_tell_me_about_yourself1gbko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/32442bf1-241d-476b-b4de-e94d85c8c8c7/41899200069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b3e095-3d2d-46d4-a3c5-d7904a24d5fd/fonupisanojaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c009767-4fc7-404d-839b-8ee6804f221e/how_to_get_free_rp_league_of_legends_2020.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_d5bddf8328b3435590e6c3622df74cbd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bde1591-460d-430b-a6a8-09e7b81c3c79/audio-technica_at-lp120-usb_turntable_-_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e1c61f-3d18-4077-9812-68c18a479f47/icom_756_pro_ii_manual.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_4d89c94512eb4acb8beb830b0eefcbf1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e2b117-1ef2-4fbc-9db6-310a7f91a0dc/how_tall_is_manny_heffley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f326377-c71f-4fff-a41d-ee2750e250ee/boss_dd-5_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91025e8e-76e6-42fc-9b94-9b71825282c2/mainstays_slimline_digital_scale_accuracy.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_ed2bcf3724604d13a00d656c79ea340c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 5824 bytes
SHA-256: ebb3a2a054bcae138f2b393df7b2e5d522234c312f320e66055b335d33002129
font_01_sfnt_off00011d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D98 3204 bytes
SHA-256: a0f5a8dfeaa0bb6dc0effbaf73f2996d6fa971a09dbb121d521afc971fdcd47e
font_02_sfnt_off00012a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8B 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_03_sfnt_off00013319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13319 11168 bytes
SHA-256: 9f715b758547b54ddbd4c1357c1be3b540e55a9eb3c333a4dea7b380a47d13e2
font_04_sfnt_off0001595b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1595B 16068 bytes
SHA-256: 5338b60dac2ddcc9fbf81734882903060897ff8c18563aad6864a581beec55c6