Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ef5b5e2679c5f0…

MALICIOUS

PDF

76.8 KB Created: 2021-03-09 22:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 67ce33c7d65bde857a408eb76439af62 SHA-1: 431e8e8f25b93044b3f72d6a376581d544d81fde SHA-256: 39ef5b5e2679c5f064d51a791514e1841afa802177861de2cc3e5cef911ba19b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to numerous external URLs, including a suspicious domain 'ponafet.ru'. The document's structure and embedded links suggest an attempt to drive traffic to potentially malicious or deceptive websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://ponafet.ru/strik?utm_term=future+of+life+insurance+industry+in+india PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putojurisepanu.rf.gd/what_is_the_importance_of_writing_a_business_plan.pdfIn PDF document text
    • http://nudibiwer.epizy.com/metovadasapiso.pdfIn PDF document text
    • http://magajavopisili.epizy.com/65590238747.pdfIn PDF document text
    • https://a3e8d6b6-68ee-4625-a313-a25a09dbd39d.filesusr.com/ugd/312e12_6f4fbfac6e7442c6af9b9cc3bcc01253.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae44d2a-8e08-4093-8f4f-041e862fe10b/61578034822.pdfIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_9bc83f12060647cf863ab10e583a10e0.pdf?index=trueIn PDF document text
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_805ea5aa4a25411790c262828c6e8638.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38a95c7-4450-4660-bb2d-2ee8a31d1bf5/vofabizaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee720ffb-4062-4bcd-a27a-c4ac6bbe6d90/best_oil_filled_radiator_for_large_rooms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c08b89c-a86c-4639-b739-3f94a390ce05/karcher_pressure_washer_customer_support.pdfIn PDF document text
    • http://ruxabuzavejar.epizy.com/pokemon_emerald_guide_apk.pdfIn PDF document text
    • https://8533cbf3-c0d6-400c-bdf8-8ca38cf0242b.filesusr.com/ugd/135178_207f4a80431b48338b6e1bbed2b8e970.pdf?index=trueIn PDF document text
    • http://selomuxoper.epizy.com/joxopewisimugeguxuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49124019-d51e-48cc-aa8d-ec824aef194f/dipedepokix.pdfIn PDF document text
    • http://vavuzudimolig.rf.gd/63312462356.pdfIn PDF document text
    • https://6648aa49-deb3-4d6f-81a8-a63cc7a297fb.filesusr.com/ugd/38eac1_6a37b2a15767499e98dc965780300d49.pdf?index=trueIn PDF document text
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_ef82ae68904745a18711d6045936ed38.pdf?index=trueIn 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_off0000eec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 5072 bytes
SHA-256: dff4084ad1c5ed8d089635175481c3bd5dbb0a387d5d7ed16d5595fcfef91b50
font_01_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 11128 bytes
SHA-256: cbc1cb27d7ad888f635ca2000dcf1e2e7b858bda09013db19e3956a761bd79c7

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