Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0578cf0237e5ddd…

MALICIOUS

PDF

68.1 KB Created: 2021-09-30 11:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4ec475a63f0caab492da0f6d0fd56015 SHA-1: 220b3fb05adffa440ded9b429972c654158cbcb9 SHA-256: b0578cf0237e5dddd33d9938202d65a9a67d89601428e166dc51c7fb16d364a5
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link, a common tactic to deceive users. The heuristic 'PDF_IMAGE_LURE' strongly suggests this. While no scripts were explicitly extracted, the presence of numerous external URLs, including one pointing to a PDF file, indicates a potential download or redirection chain. The ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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 68 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
  • 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://medvor.ru/uplcv?utm_term=conjuring+3+full+movie+english PDF link annotation
    • http://magnumprint.ru/upload/files/xarotavanekip.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/60403301985.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/japikoneru.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/52085462480.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/razetupuraduw.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/wabux.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/75377058264.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/50225894352.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356dbbc9bba---28965241162.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/duzutixizadiwapo.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/lepiwewor.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/lavanum.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/sategebolelulu.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/kusubarele.pdfIn PDF document text
    • http://lokalsport.no/userfiles/file/todalaretesexifujonuxexu.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/22575573202.pdfIn PDF document text
    • https://zaragozadenoche.es/upload/files/14575541539.pdfIn PDF document text
    • https://go2germany.ru/files/file/32801637228.pdfIn PDF document text
    • https://ip-pharma.net/data/files/madipovofiwelijefe.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/xalane.pdfIn PDF document text
    • https://sino-islam.com/upload/file/251017363170.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613300a93465e---13276069402.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/mepinozaredijelena.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/23700172115.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://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_off0000ae63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE63 10900 bytes
SHA-256: 7283ceb5189fe149073bafdc8381fdb4da06a57785163386ac917341d76f09ac
font_01_sfnt_off0000c76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76F 14212 bytes
SHA-256: bcf83b02e8140c2a45f6be4d06ed3be68adeb05d326a8d58e41a5807876ac2fb
font_02_sfnt_off0000eaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1