Malicious PDF — malware analysis report

Static analysis result for SHA-256 06378b01246b8834…

MALICIOUS

PDF

73.9 KB Created: 2021-09-18 16:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d11d2f3bbbb6742fd334a9cd52f4066d SHA-1: b8ca5a2f730c84cdc5ab10451cb4c99b2d0c5e03 SHA-256: 06378b01246b88343418e62fc8efd6f5c40eb3c1792840d346f1987fbcab8612
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, with several pointing to unknown or potentially malicious domains, indicating a phishing or redirection attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further suggests a malicious intent to distribute links. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://floridare.ru/app/webroot/img/uploads/file/241801_reregikiruka.pdf In PDF document text
    • https://bankubezpieczen.pl/userfiles/file/56303166167.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/gowalezipuwilevojan.pdfIn PDF document text
    • http://potlista.com/file/files/39783088303.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/79727582680.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210903_7FD1E03DB85AD646.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8ed902fcd---pirilazo.pdfIn PDF document text
    • http://hanarotalk.com/userfiles/file///27981350909.pdfIn PDF document text
    • http://phubozena.pl/userfiles/file/62520347106.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/zeporareruge.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/51974316809.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/81091475066.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/4732478891.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/simotusivuzobifisomif.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/jisupitijofaxovifobizu.pdfIn PDF document text
    • http://sinners-party.de/media/file/49762982261.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/73100873129.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/41305923085.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/e25a6e9a25d2f1806408d7f0300d62c1/65057143112.pdfIn PDF document text
    • https://airshow-bg.com/file/vadawi.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/jasilabiridofan.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/65364553014.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/23213136761.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/78663611776.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/galisepugerodiwevuwufili.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/wetuvosuxolaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=mod+yugioh+duel+generationPDF link annotation
    • 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_off0000be3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d64e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64E 16968 bytes
SHA-256: d4bd2e055a26f7174b2274be2e991b4aede09dd15a3400b15126bcef5e6fdf45
font_02_sfnt_off0001022a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022A 10568 bytes
SHA-256: eb43fde6fcb31d8c09fe6d3bdefbfe648bd080be57a503701e3b04fba38ae1e4

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