Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea58a874567551f…

MALICIOUS

PDF

63.8 KB Created: 2021-09-16 08:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17ab4992b7bf3cd1640f099db29274e6 SHA-1: 5f38ad98f7e32f8d45164cc560500b999ae148c2 SHA-256: 8ea58a874567551f501eb3442384bd8fa97dc279e16ea9fe77a3bf53c2ab9cbf
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking a link, a common tactic for delivering malware. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5445

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 63 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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 http://euroteam.vn/ckfinder/userfiles/files/lazafa.pdf In PDF document text
    • http://movitecnic.fr/ressource/site-image/files/43690680864.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/fuginu.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/61603122651.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/10158043448.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/ditanowazezazatukebogif.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/26772376747.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/36282496704.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/vubipimamijabakamaxoset.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210908113844.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/wosoweboja.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/zojuliwosem.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/11228598943.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/88565259354.pdfIn PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/juzelejolekagaziposekiz.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/molarerowibebalufewalekif.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/jolewovupiwot.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16139a3565ee3e---65169627936.pdfIn PDF document text
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/lugetufoxukugesenijemat.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/lezekuzugedoko.pdfIn PDF document text
    • http://matras-devison.com/upload/file/30689971337.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/bidepajebujebuzuwezeloza.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/jajelofosakujekipeg.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210914061232.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/jolulotawigasapepinenag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=mtg+arena+compatible+phonesPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/91736575488.pdfIn 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_off0000b081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 13756 bytes
SHA-256: eed675f5083917c9bd24628fd81dd6ba26a051c7e845bc4b91967ad024f64558
font_01_sfnt_off0000d25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 10956 bytes
SHA-256: 58481d14cdb99469cc0fe60dba0086973a8189f9428a0c8f7288937ed2ca1744
font_02_sfnt_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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