Malicious PDF — malware analysis report

Static analysis result for SHA-256 a07ce0f20e0b90f6…

MALICIOUS

PDF

71.4 KB Created: 2021-09-24 14:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 7cfc0dcbf15817a22b7ce64a6e24a224 SHA-1: 03f83cb08c96a1958f849daa2d7e56b5f9ae26ec SHA-256: a07ce0f20e0b90f636de3fa7256295a555fb6aaee6e1386c9aac157d0208f5bc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this behavior. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7676

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=filmora+mod+apk+latest+version PDF link annotation
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/zojatopivuxu.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/54768707950.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/nadob.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/25385347089.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/37468463806.pdfIn PDF document text
    • http://inphuduong.vn/upload/files/80546530693.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/jitenonasodunikesopar.pdfIn PDF document text
    • http://lifebeachvilla.com/uploads/image/files/wipefokokugobiva.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090115540236.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/nefoketidovajumed.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/jiliwubetobiwewibasujepi.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/xomudeno.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210920_160951.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/38863716840.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/3928323742.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/1466972940.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/wiraruvikawosorerupobula.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/51481346855.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/83621289372.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613babec772e8---sipuvore.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/zulimaxupebotox.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/90246095575.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/44910228183.pdfIn PDF document text
    • http://standardamulet.com/files/files/rawevimaxosigozaruxub.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/fipakomesurugajilo.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_off0000c001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC001 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_01_sfnt_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 18972 bytes
SHA-256: aae46b76a87040053c42cd6f2c785a0a3fdc6d45052f3eae3613809233be4d10
font_02_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1