Malicious PDF — malware analysis report

Static analysis result for SHA-256 47abe7b49014027f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-16 17:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7b452b930407d860744efe6f84b6510e SHA-1: 0fbe86a0a2671c5632c35e1978b1315dd1c2a616 SHA-256: 47abe7b49014027fb0602707be24cfebbbb3d67c9a211f0eed44f850c08e7989
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, with one URL specifically mentioning 'grand theft auto online' as a lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=grand+theft+auto+online PDF link annotation
    • https://workinhotel.com/upload/fckfile/xowemotogusodanusar.pdfIn PDF document text
    • https://schachverein-marchhoefe.ch/fcsr/news/upload/file/34150153553.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/zagemobifigid.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161359f54025e8---13862149358.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/kovosadujojiwobaketo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2f9adbefe---24239284149.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/zutoribuxelakuza.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/nusawa.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/34401420421.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/13103037349.pdfIn PDF document text
    • http://abwmercury.com/uploads/files/82312210953.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/rogajedifewonenepidag.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/97de8e6e427c6d6262314385a789a28f/79971372118.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/55209487448.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/xapegavonuwarevude.pdfIn PDF document text
    • http://atsolution.org/userfiles/file/20210912063339542446899.pdfIn PDF document text
    • https://itscebu.com/upload/file/20210902085005.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/18938779812.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/34908522771.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/99995698413.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/161424e703ebd6---vabumosepipopo.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16130af2e4428d---64276562121.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_off0000d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC1 10420 bytes
SHA-256: 2ad6dbc146c8e70ca30d6fdc11e5fab94ce61ea637783857b28c53318b83e698
font_02_sfnt_off0001073d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 17084 bytes
SHA-256: 1d7a5010b23fa6290fd2222721507f2546310bd1ed30fd3c25ef235d60a18ec4