Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ee92bf54accfb6…

MALICIOUS

PDF

72.0 KB Created: 2021-02-24 23:30:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 865f18367b6bc8eb0c7565aa9cca136f SHA-1: ab5328408845f5c317e0cc4192e8cc18fe94ab3e SHA-256: 30ee92bf54accfb607491f577b9830de0ea7e46d39c0532a3452361bb0b19f4e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'bologen.ru' and disguised with a search term for a Kindle case, suggesting a lure. The PDF structure and embedded links indicate it's part of a link farm designed to redirect users to potentially malicious content.

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://bologen.ru/strik?utm_term=amazon+kindle+fire+hd+7+2012+case PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393911/normal_600d1ee031bab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413583/normal_5fc73414136d0.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/who_wrote_the_quran_quora.pdfIn PDF document text
    • http://gepexoliv.medianewsonline.com/vans_old_skool_platform_white_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470692/normal_5fdb61ff1088c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fe8b517854b6.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/banuvopegoxowerudabudaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452400/normal_6015ca80f2a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_5fd99976e5f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fdae4dd43b2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497082/normal_5fefa0e0ab818.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dipulitexaxuz.epizy.com/dark_knight_returns_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/vawadiwipabuw.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/geluvodaxozejuxakofak.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/muvobumivekebarajanavuzif.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/19995153828.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/52906713456.pdfIn PDF document text
    • http://wisotoginiso.rf.gd/gifijirubelitunudo.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/epfo_form_annexure_15.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/vepovafusabomafozu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05B 5480 bytes
SHA-256: 61252ec27e56e5f037fa80fd43b11743ae941bb5094dc48b729ccaeee011f0a7
font_01_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 9736 bytes
SHA-256: f8c5675e3d2d09a8256e3e66eafec52f5a648ebb8703e5116620c566b864085b
font_02_sfnt_off00010408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10408 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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