Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff7874260b395d2…

MALICIOUS

PDF

75.5 KB Created: 2021-09-13 11:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9aa027fcb6c51537a4150303a1141e8a SHA-1: 17906ccfd131916ae9682629014f6348b5bfdfa5 SHA-256: 9ff7874260b395d2f32d6986135ad571674c977ff023da2c0ff73e16d5fb968b
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which appear to be part of a link farm. The ClamAV detection and the presence of external links suggest a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3653

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://archism.ru/uplcv?utm_term=dream+league+soccer+2019+cheat PDF link annotation
    • http://bjerkelunden.org/content/files/userfiles/file///jisokorinomabifasarofezi.pdfIn PDF document text
    • http://azco.friend-match.com/upload/files/dapipajofufufigesobep.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/46631702179.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/19207234355.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/jasiwa.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/rofoxujidawagori.pdfIn PDF document text
    • http://liily.jp/upload/file/20210907143703.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/75017735273.pdfIn PDF document text
    • https://robindayne.com/ckfinder/userfiles/files/bebibalamovo.pdfIn PDF document text
    • https://cebrium.ssnn.ro/images/81244245659.pdfIn PDF document text
    • http://jjsgreatescape.com/uploaded_files/userfiles/files/57987156198.pdfIn PDF document text
    • http://media-production.net/admin/ckfinder/userfiles/files/notafamizugeritobiwevig.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/7343061266.pdfIn PDF document text
    • https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/zofimena.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/gavuwotimejiwanis.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/gapomidoti.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613eefc9e2a18---57239634690.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/60619063992.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/3974816104.pdfIn PDF document text
    • http://mariancozma.com/_user/file/wuwota.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/1381984037.pdfIn PDF document text
    • http://shmgec.com/Uploadfiles/files/wutojevukadav.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/93473093046.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/72398292851.pdfIn PDF document text
    • https://digiconelectronics.com/media/13185989323.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_off0000cb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB05 11044 bytes
SHA-256: eb648be97244b2e8dbb11f44e07b4a71c941c986d278c0b1b72b3780f190517a
font_01_sfnt_off0000e4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E0 17400 bytes
SHA-256: d39cdd10ac007660d55ff5241a93cec9b8e13f6e993fbc3533da5584c82b7db4
font_02_sfnt_off0001120d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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