Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccbfdba89b79ca1…

MALICIOUS

PDF

90.9 KB Created: 2021-02-28 08:20:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5cfdc1f7f7a645e57c0cc83b4d08afa7 SHA-1: 7d910f03ed6534fa2d72d327ef034fb8363f007b SHA-256: 3ccbfdba89b79ca1eadb5c1f198deffd331181a0328f8ea6bd3ecf033c2bdcb6
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 malware distribution attempt. The document contains numerous external URIs, with a notable one being https://botokaw.ru/strik?utm_term=ya%25C5%259Far+nuri+%25C3%25B6zt%25C3%25BCrk+yats%25C4%25B1+namaz%25C4%25B1+ka%25C3%25A7+rekat, suggesting it functions as a link farm to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=ya%25C5%259Far+nuri+%25C3%25B6zt%25C3%25BCrk+yats%25C4%25B1+namaz%25C4%25B1+ka%25C3%25A7+rekat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387566/normal_6019d7a9c9249.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/hg6cgeM/44388547856.pdfIn PDF document text
    • http://dezunajuvuzen.22web.org/the_mans_no_nonsense_guide.pdfIn PDF document text
    • http://goxuvux.22web.org/ubuntu_32-_bit_server_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/digusamixi/jficFia/painting_kitchen_cabinets_black.pdfIn PDF document text
    • http://zeropium.com/2017_subaru_outback_maintenance_manualdxzlk.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/w2jfiQ2/26289317686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426686/normal_5feb685b11ccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_5ff441f00a51c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_60251f8573b2b.pdfIn PDF document text
    • http://znakomstva69.space/armorsmith_extended.esp_missing35mv8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wixesikive.epizy.com/69283322250.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/jefokifitedodaw.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/berizimodeka.pdfIn PDF document text
    • http://zefexulipovi.rf.gd/anganwadi_form_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10779 5696 bytes
SHA-256: b102f88719deb0a7b0b4445d7e2adfb7f6b64382eca1f8d83cc52f0c3943a8d9
font_01_sfnt_off000119af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 12484 bytes
SHA-256: 0bb891142eb81fc2138dfcda1dc77e4eeeb422b4231b4c178282d01957a178b1
font_02_sfnt_off00014081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14081 17872 bytes
SHA-256: 69081762bc8c157f8e496ffbd86c0648612118da651fc5f0b65fac5f48c5ac8c

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