Malicious PDF — malware analysis report

Static analysis result for SHA-256 7972944d36327095…

MALICIOUS

PDF

143.6 KB Created: 2021-02-21 04:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c4c30dd5a52523ecc3d4d4f9109d95a5 SHA-1: 02774a14b346f92639d3e9f87f91d6fa324f2d81 SHA-256: 7972944d36327095d5c6da91b884c90afb19ed75466a52817a24b10b34d7b5db
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or distributing further malware. The document body, though partially corrupted, contains references to 'wkhtmltopdf' and a biography title, likely a lure to disguise the malicious nature of the links. The presence of 'powershell_formatter_vscode.pdf' in the document text hints at potential command execution, possibly to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://seumenha.ru/strik?utm_term=bartolom%25C3%25A9+de+las+casas+biographie PDF link annotation
    • https://jewepixixa.weebly.com/uploads/1/3/0/8/130814248/zaxotukefiwire.pdfIn PDF document text
    • https://saripubisopa.weebly.com/uploads/1/3/5/3/135322362/detizaviraxipodivub.pdfIn PDF document text
    • http://goromeo.club/data_flow_report_qatarphxb6.pdfIn PDF document text
    • https://jitegolugitu.weebly.com/uploads/1/3/4/6/134643776/0bb9249788.pdfIn PDF document text
    • https://fogolaliri.weebly.com/uploads/1/3/2/8/132814342/14672c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457298/normal_5fe25cb80de4a.pdfIn PDF document text
    • http://leafester.online/26665530708pxtlt.pdfIn PDF document text
    • http://kudretbozaci.com/18969415607ugndm.pdfIn PDF document text
    • http://reduslim-shop.site/94588019063jguzt.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/ripotuzudodanav.pdfIn PDF document text
    • http://mukidulutovig.iblogger.org/detox_diet_plan_dr_oz.pdfIn PDF document text
    • https://polatoni.weebly.com/uploads/1/3/1/3/131379392/c0168ea82.pdfIn PDF document text
    • https://mewifukemi.weebly.com/uploads/1/3/4/7/134764424/tataridexu-nufipobawifirep-vomebukefe-jeloxatubu.pdfIn PDF document text
    • https://dibigisilob.weebly.com/uploads/1/3/1/6/131607467/522113.pdfIn PDF document text
    • http://123dutch.com/114151330698kuo3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_6012960fee200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_602e29ba5c70d.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
    • http://duguteterexu.epizy.com/gabelapulivefixigen.pdfIn PDF document text
    • http://kanabobexodu.epizy.com/how_to_check_ink_levels_on_hp_printer_6978.pdfIn PDF document text
    • http://baduwujik.rf.gd/powershell_formatter_vscode.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_off0001cb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB8F 5500 bytes
SHA-256: bf683419a0ec14652297f462f2778f3a1b79dab8acd58f54e7762f01c9cbb72c
font_01_sfnt_off0001ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DDF8 13604 bytes
SHA-256: bde96bf4e295218fade0e74c7b1de4e0b939b2cb89880a1936b3780026b8da7b
font_02_sfnt_off000209de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x209DE 16428 bytes
SHA-256: f51b8c6f929ffe86d11bb2993523d2ce69e372d67e14fff97199c90c54d9d464
font_03_sfnt_off00022018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22018 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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