Malicious PDF — malware analysis report

Static analysis result for SHA-256 3830925f3b73968e…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 04:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9645bc1d32006ee836d3066f3f30ff6 SHA-1: d512f4d8e4c3b5148e25f6a76515d6045dfeb731 SHA-256: 3830925f3b73968ee48c5ba213ce329c5aaa509b766b1b9e7a96a29024d46725
126 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Dna profiling worksheet'. Numerous external URIs are embedded, with a significant number pointing to disposable hosting domains, characteristic of link farms used to distribute malware or host phishing pages. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://zajinet.ru/wix?keyword=dna+profiling+worksheet
    • https://cdn-cms.f-static.net/uploads/4489257/normal_600b6862dd875.pdf
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5ff64f06d10b6.pdf
    • http://budivev.scienceontheweb.net/mejor_libro_historia_de_las_religiones.pdf
    • https://cdn-cms.f-static.net/uploads/4495536/normal_601d25dd6fcc3.pdf
    • https://cdn-cms.f-static.net/uploads/4454575/normal_602f095fb5433.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_5fe697b263b14.pdf
    • http://limezage.scienceontheweb.net/fundamentals_of_electronic_communication_1.pdf
    • http://tubesebove.medianewsonline.com/applied_mathematics_and_mechanics.pdf
    • http://virutimi.22web.org/62990349796.pdf
    • https://static.s123-cdn-static.com/uploads/4485313/normal_600739730122f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://ruxozuxikoba.rf.gd/pdf_to_word_converter_application_download.pdf
    • http://tatesit.myartsonline.com/pokaxudidugadedosewosab.pdf
    • http://jumepenitujox.atwebpages.com/sovotena.pdf
    • https://uploads.strikinglycdn.com/files/076657eb-be54-4f57-8c66-00eef214ef4c/traxxas_tqi_transmitter.pdf
    • http://nakarajibap.myartsonline.com/96498911347.pdf
    • https://uploads.strikinglycdn.com/files/4e8009b5-30db-4970-802f-d21ee4f18af9/veterinary_technology_school_near_me.pdf
    • http://nukivamo.myartsonline.com/ncert_english_grammar_book_class_9.pdf
    • https://uploads.strikinglycdn.com/files/88350010-d26f-4a07-8383-9c67498b3dcb/35953186986.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_off0000fd0b.bin
5eb52842d9a97ce39b9e43912434f1f978b0acb70a0f68b50edcde2f4349b3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0B 5320 bytes
font_01_sfnt_off00010f39.bin
e4b3c3e0bebaf44bd98b1d1229ff772b4bd8a56bc8939409065388ec9d15a41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 11196 bytes

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