Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff478b4e3f4411e…

MALICIOUS

PDF

139.9 KB Created: 2021-05-04 09:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e14b448e7bd285d820704aedbc0c4128 SHA-1: db84bc95113c57375931f0f92b73b25f5d7e71ed SHA-256: eff478b4e3f4411e37c62953dc79d4ff5a6b447df77f6fd329dccc0cce14b2c7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that is likely part of a phishing campaign, masquerading as educational material. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=holt+mcdougal+algebra+1+book+answers
    • https://cdn-cms.f-static.net/uploads/4413011/normal_60446fa33b1c4.pdf
    • https://cdn-cms.f-static.net/uploads/4393908/normal_603038be13f25.pdf
    • http://pycnidwzxc.info/13929208768yaaf4.pdf
    • http://flowerport.store/magaxan48vfg.pdf
    • https://cdn-cms.f-static.net/uploads/4501962/normal_604564286f89c.pdf
    • https://static.s123-cdn-static.com/uploads/4451760/normal_5ff340447af5a.pdf
    • https://cdn.sqhk.co/nepofigiper/fjhjiid/ground_drill_machine_rental.pdf
    • https://cdn-cms.f-static.net/uploads/4422150/normal_6039038fa93b1.pdf
    • https://cdn.sqhk.co/nojedajoze/jeeoieS/fibolize.pdf
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ffe93ac6d7c0.pdf
    • https://cdn.sqhk.co/pulovafafita/fjdBT8p/lazofipot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://semofif.epizy.com/jinodiwe.pdf
    • https://s3.amazonaws.com/jigezilor/25253639527.pdf
    • https://s3.amazonaws.com/bezutu/atm_card_apply_sbi_form.pdf
    • https://s3.amazonaws.com/kimone/robepamakureziwo.pdf
    • https://s3.amazonaws.com/liwafo/siemens_plc_programming_book.pdf
    • http://kexobub.rf.gd/getujivewuxuladofejo.pdf
    • http://fojofediwesifog.rf.gd/nirozakuzugoxusibo.pdf
    • https://s3.amazonaws.com/lulelepese/andrew_loomis_drawing_the_head_and_hands_espaol.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_off0001e5f6.bin
761bedd9ee2c399abf4e0de6d81f9db535f7af10ee52fa21bbc168c95a9e877d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E5F6 5568 bytes
font_01_sfnt_off0001f8dd.bin
c90fe5301e545c9a27eadf8e215e701a907589381f097f27d6fb17cca913541e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8DD 11572 bytes

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