Malicious PDF — malware analysis report

Static analysis result for SHA-256 44552f0f58ef113e…

MALICIOUS

PDF

72.8 KB Created: 2022-04-07 18:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: cab3f68f3e85309f41ac6130e140705f SHA-1: 135699d5d97b072da561fa40f1cd657383c5b541 SHA-256: 44552f0f58ef113e608b1f3c416c2b1df64c111ef9cab69f3e51bb537254e993
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of external links, indicating a link farm likely designed to redirect users to malicious sites. The primary attack pattern involves leveraging these links for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://norin.co.za/YmrXLWy8?keyword=possessive%20pronouns%20questions%20and%20answers PDF link annotation
    • https://artedeeducar.com.br/ckfinder/userfiles/files/13053828154.pdfIn PDF document text
    • https://simixoko.weebly.com/uploads/1/3/4/8/134867908/d1e5b.pdfIn PDF document text
    • https://vejesare.weebly.com/uploads/1/3/4/4/134493146/zajawotekugisexoji.pdfIn PDF document text
    • https://xadadoroz.weebly.com/uploads/1/3/6/0/136024884/7eb3794b1d.pdfIn PDF document text
    • https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/3225575.pdfIn PDF document text
    • https://tepidopuk.weebly.com/uploads/1/3/4/6/134698813/ccf09b55ab.pdfIn PDF document text
    • https://numurivigafezu.weebly.com/uploads/1/3/4/3/134390613/sekejapudabanen.pdfIn PDF document text
    • https://milevemelola.weebly.com/uploads/1/4/1/2/141217889/9819761.pdfIn PDF document text
    • https://jizetexosobuwek.weebly.com/uploads/1/3/0/7/130740437/6296110.pdfIn PDF document text
    • https://girowotejetut.weebly.com/uploads/1/3/1/4/131406843/4921225.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/9077028.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/zedogelogozinosi.pdfIn PDF document text
    • https://jibisovewa.weebly.com/uploads/1/3/4/6/134653871/2427856.pdfIn PDF document text
    • https://zivopelorikeder.weebly.com/uploads/1/3/4/6/134677217/kevawusogigufadazegi.pdfIn PDF document text
    • https://soxagunolipug.weebly.com/uploads/1/3/4/8/134887217/fopulexof.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/tigesowifewovovin.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/nudew.pdfIn PDF document text
    • https://directglobal.ro/files/file/50055064596.pdfIn PDF document text
    • https://bufetijakuvarit.weebly.com/uploads/1/3/4/8/134878832/7852055.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://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_off0000b6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6AD 17432 bytes
SHA-256: 6e7a11c6cb8e6191109b98da98d7bfd4c4ce65d5f74c520420bb76e2b0c91056
font_01_sfnt_off0000e472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC89 10736 bytes
SHA-256: a7e505669cecb34f634e6954deaa03aa90fc340860025a1074ea8d9c19a8d5c4

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