Malicious PDF — malware analysis report

Static analysis result for SHA-256 082a1c8f8b6a2e73…

MALICIOUS

PDF

116.0 KB Created: 2021-03-03 10:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: a43a50563faaac2cc9743b0153c82c68 SHA-1: b08ce1acc89c34d06667b3d19587e9871ce5c2fb SHA-256: 082a1c8f8b6a2e73cad312fd2defc2b7ee281987b3d66fd49720c4ed7c05763d
166 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely attempts to trick the user into installing a malicious browser extension or update. While no scripts were directly extracted, the presence of numerous external URLs, many on disposable hosting, suggests a phishing or malware distribution attempt. The document's structure and embedded URLs point towards a social engineering attack aiming to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://maypoin.ru/123?utm_term=iso+9001+version+2015+internal+audit+report+sample PDF link annotation
    • https://tedipoji.weebly.com/uploads/1/3/1/4/131408178/duropatugixezafumi.pdfIn PDF document text
    • http://rastet-malysh.ru/marvel_contest_of_champions_apk_data_offlinefgh3z.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/I4Vhjid/nabixafixo.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/RSxR9jh/84080356386.pdfIn PDF document text
    • http://varietystore.website/tuvujabifamowof9md13.pdfIn PDF document text
    • https://jaligudupu.weebly.com/uploads/1/3/5/3/135391073/sozupotuzu.pdfIn PDF document text
    • https://voberugupov.weebly.com/uploads/1/3/4/4/134496708/xebawomolezodo.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/jibiroduzil-wenakawepoguget-gukix.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/ehistjb/remixes_of_old_songs_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476567/normal_602222187997b.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/03025.pdfIn PDF document text
    • https://juwudusufutibor.weebly.com/uploads/1/3/0/8/130873872/birapesik_wifufevozozi_witebozaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462093/normal_5ffea553c43a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/project_management_communication_plan_template_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18934 5708 bytes
SHA-256: 40f859ebf32fe7d0e7c737acc9ba981feca171505a2b993c5d9da8c0a7599db0
font_01_sfnt_off00019c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C94 11032 bytes
SHA-256: 1731a5d895cabcf8ccaba083d8305615d40fcb8b66985f035893023a1e9c9e70

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