Malicious PDF — malware analysis report

Static analysis result for SHA-256 09aa26e6ba43024e…

MALICIOUS

PDF

74.1 KB Created: 2021-02-17 19:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 31d0cd24604c8367a95810438ee056d6 SHA-1: bc2b3bc5b8e17dd7508aef553c616e1dcaf588d0 SHA-256: 09aa26e6ba43024ed48b04c04b6cc7387a08e9e027043d9fae896b336b5740b8
126 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that redirects to a suspicious domain, likely intended to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though obfuscated, appears to be a lure related to plasma cutters, aiming to trick users into visiting the malicious link.

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://maypoin.ru/123?utm_term=what+materials+can+be+cut+with+a+plasma+cutter PDF link annotation
    • http://docita.fun/wixekanopizalatr7sj.pdfIn PDF document text
    • http://beststudent.space/pixoloxizoranoniwg2kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413701/normal_5fea42e560dee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417830/normal_5fe4530bd8ef8.pdfIn PDF document text
    • http://wowitaly.pro/the_scarlet_letter_study_guide_answersqw8it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404987/normal_5ff545fb82c1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452588/normal_5fca219cc445d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_6022291a0997d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5fdec966dbf9e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xapota/chamak_video_song_kannada.pdfIn PDF document text
    • http://bokatamekal.rf.gd/56202695609.pdfIn PDF document text
    • http://xojorefalez.rf.gd/44106368025.pdfIn PDF document text
    • http://mibexaluji.epizy.com/55768125903.pdfIn PDF document text
    • http://febaxur.epizy.com/nifujasewasakijubafopad.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/adobe_reader_apk.pdfIn PDF document text
    • http://ziboporo.epizy.com/business_income_statement_template_excel.pdfIn PDF document text
    • http://pudekixepubaz.epizy.com/botulismo_causas.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE276 5420 bytes
SHA-256: b0d6e44791d44129e7f1d38293403d0d9c76371bafc48edf0c891032b49d73de
font_01_sfnt_off0000f4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CC 11372 bytes
SHA-256: fdc15027ca37d85bf25db3b9988a3a8c4604c77e7037f7e1c498edd79b410db3

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