Malicious PDF — malware analysis report

Static analysis result for SHA-256 7270445902ff1c60…

MALICIOUS

PDF

76.1 KB Created: 2021-04-09 23:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d701910f598599139ca504bb806c50d1 SHA-1: 266df01efabd49ae23a0ebccac731208572afb91 SHA-256: 7270445902ff1c6022ed28bcf80911812b5a9a77257c4a6d7df5a868b3de55ed
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a phishing page disguised as information about hearing aid costs. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=how+much+do+hearing+aids+cost+in+south+africa
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5fd1bc302a4a2.pdf
    • http://dororuminaxa.mywebcommunity.org/36914174131.pdf
    • https://static.s123-cdn-static.com/uploads/4369777/normal_5fc86a2797e4c.pdf
    • https://cdn-cms.f-static.net/uploads/4481058/normal_601eaa1d7db91.pdf
    • https://cdn.sqhk.co/xavaxonad/MFSWgic/88552958916.pdf
    • http://tuwasukam.getenjoyment.net/84058438891.pdf
    • https://cdn-cms.f-static.net/uploads/4420775/normal_605707d36f65f.pdf
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdf
    • https://cdn-cms.f-static.net/uploads/4475997/normal_60328024383ab.pdf
    • http://niwadeg.mywebcommunity.org/anamnesis_clinica.pdf
    • https://cdn.sqhk.co/dalubevemex/jbkhaiE/95106480990.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/20d05b71-5177-4abb-912f-ed035c93f785/sims_3_free_expansion_packs_origin.pdf
    • http://kumobeba.epizy.com/logokudalazununute.pdf
    • https://uploads.strikinglycdn.com/files/27a3c829-adf7-4078-94ea-654010139fa5/what_is_the_oldest_known_book.pdf
    • https://uploads.strikinglycdn.com/files/fd767b26-0a22-4129-8f47-e4825fcd41ef/fantasy_ice_cream_factory_sf.pdf
    • https://uploads.strikinglycdn.com/files/5e518a48-a466-47c6-9529-808ce70a8911/pumimasijimakonatexef.pdf
    • https://uploads.strikinglycdn.com/files/8f3d5759-3c55-4fe0-b8b1-fcbe4b460993/58049776772.pdf
    • https://uploads.strikinglycdn.com/files/46157cd4-88b3-493a-b1c0-5bda21a06890/conversion_de_mm_a_pulgadas_tuberia.pdf
    • https://uploads.strikinglycdn.com/files/d2e09dda-3a4c-422a-952b-c91975303bb3/95725074470.pdf
    • http://mokatelizomopi.rf.gd/galiku.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d0.bin
58a68d574119b7a5aac7e1d5eabf5ac40b340f3051a4efa60009743ac1c0cf28
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D0 5456 bytes
font_01_sfnt_off0000fc45.bin
616d4510f04be3b1ef45b0cb31745f5a0f56c8f9f39c10c1897f4b6d62c2646d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC45 10772 bytes