Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e082b5e0c13ba64…

MALICIOUS

PDF

82.3 KB Created: 2021-09-15 19:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f5ba02bdec7d38f164158fb99a70f740 SHA-1: f4bc8e5ff97afbce55459f46fe546e43c091ecf5 SHA-256: 5e082b5e0c13ba646e9af5aa36b7a3e2eb184375a8a5368f9f51cab655c1a1e8
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or redirection mechanism to deliver a payload. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit vulnerabilities or trick the user into downloading a secondary malicious file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://allytemp.ru/uplcv?utm_term=api+book+of+medicine+pdf PDF link annotation
    • http://www.vegagastro.pl/upload/file/kipimevofuxewigiv.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/zogogegodabiwijalifoneri.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/wivajowekobozilezuxe.pdfIn PDF document text
    • http://celeb.huh.hu/UserFiles/File/zeledajijagawevo.pdfIn PDF document text
    • https://medpressa.ru/files/file/divuveg.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/68047579416.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/kitapijudovirapotilalen.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/navutexuxelefojewini.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/virasazubapapikedepok.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/buvuxu.pdfIn PDF document text
    • http://beverleyannes.net/home/beverley/public_html/ckfinder/userfiles/files/32694335661.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/76904751363.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b837e9c81---rarifajo.pdfIn PDF document text
    • http://moneymaker-gold.de/files/55375535384.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/libubomelujugeka.pdfIn PDF document text
    • https://korankertas.com/contents/files/desererisudewijetabukawa.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5e0b32ad6be8e125e592c7153ece51f2/wijosipavamilovode.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/jenokebida.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/wazizosofikoj.pdfIn PDF document text
    • http://c-amc.com/upload/files/74001244325.pdfIn PDF document text
    • http://xn--elementy-zczne-kwb98g.pl/media/file/37945075957.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/13719853097.pdfIn PDF document text
    • http://retailcop.ca/files/49246675727.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/xowewonosetesepixiragalo.pdfIn PDF document text
    • https://www.posluh.hr/ckfinder/userfiles/files/novetuxinu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAC 16568 bytes
SHA-256: 1cf2743304cbe4d93587c38134b1a2b1bce0a1402bd736fdd8278b33a6952a31
font_02_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 18024 bytes
SHA-256: 3490fb62f6fce299778a3282bc29425416309bedbc6dcf7e10a7df5af06d62f3
font_03_sfnt_off000123bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BF 10420 bytes
SHA-256: 6c92ee69bd8b06d727ac552656f1de03e212eeff8082c2763f2f85457d0fb687

Open this report in the interactive analyzer, or submit your own file for analysis.