Malicious PDF — malware analysis report

Static analysis result for SHA-256 e327425932d1f782…

MALICIOUS

PDF

86.2 KB Created: 2021-09-13 23:06:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c19480090f5c05778c26da0d73a21d0 SHA-1: 315d701abeb640f7f421f003161e63ff88a0fa9a SHA-256: e327425932d1f78277ccc0b65984424f99dafd50684c3091034607ad6a6d61c3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7753

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://smidgel.ru/uplcv?utm_term=padmavati+movie+watch+online
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/wosatemufu.pdf
    • https://coverline.ro/userfiles/file/43225448377.pdf
    • https://www.jdconstinc.com/ckfinder/userfiles/files/34151514263.pdf
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/bilumozewo.pdf
    • http://okeefesreef.com/ckfinder/userfiles/files/megukapagomazori.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/21894644359.pdf
    • http://penzionriverside.cz/files/file/vopabalaxetirupuwaxaza.pdf
    • http://ajivikafinance.com/userfiles/file/rajunugi.pdf
    • https://hantverksakuten.se/ckfinder/userfiles/files/dirijelidos.pdf
    • http://watthaistuttgart.de/userfiles/file/patevusodikub.pdf
    • http://abwcockeysville.com/uploads/files/gisewaduvedoleju.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb3a355a8c---19064799342.pdf
    • http://gonganmi.com/userfiles/file/66335530431.pdf
    • http://citranco.com/users/files/gomunimexanoxejewerab.pdf
    • https://bodzlomu.com/userfiles/file/60254990662.pdf
    • https://jamurgoreng.net/contents/files/zosenel.pdf
    • https://tectrongim.com/uploads/files/gaxadegu.pdf
    • http://ahxxzx.com/userfiles/202109/file/bexizonurel.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/1ed37200c47cf887b4ee64f4d82cdfda/dawinamogemivarut.pdf
    • https://www.ojchamber.com/ckfinder/userfiles/files/90939344115.pdf
    • https://daulte.com/ckfinder/userfiles/files/48430163355.pdf
    • http://sportingclubalbinia.eu/userfiles/files/59356313671.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f701.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 16792 bytes
font_01_sfnt_off00010f13.bin
976e8cff6425af92be2d9db0a7106f79422b510818fab43f0236d53585f44674		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 17788 bytes
font_02_sfnt_off00013ca2.bin
8aea3b9feaa8f7050098a6ca4169e6d22a3f10752f816c0588c3c5d245780a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA2 10520 bytes

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