Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc09c974cfd2712…

MALICIOUS

PDF

77.3 KB Created: 2021-07-18 00:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8380cae0e26e9d443c4759f328c01779 SHA-1: 66c2a9cde0cf7d333a0466453d837379acb42fd9 SHA-256: 0bc09c974cfd271293c6aca703a6d742c781803fcb87fb045541fe844ba0a16d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7449

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
  • 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
  • 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://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/da0f37e35aaa6ab36a68c65e7dcbec66/powekikifizos.pdf In PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ff301cf69---wozabubovirulapagorotowul.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a0ebad154---gasepa.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a487d4c67be---zanivogekipiduzobok.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607055068c3a1---takata.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e60401dcf54b746deb5b3bf80fcfa30c/90329147753.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/vepadonatesupolagivo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/av4vpnibsv6gmqsq1hv449uu82/kokipikuravugekogazowu.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/atr41k2dhugl64ivvtfgmebad1/fipodutofarid.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/zekipuxutifavera.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///72708294288.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608676185fdd5---38329212100.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608673862f2ca---80701898914.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/tacjpd5vd6bvstjc5urc6sl931/vejexaxotonopupivubete.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3b2a67a405cef55fd5c482e65b80f7d2/72052040320.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160887a334aa1b---65917495486.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/89486447530.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/89624198082.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2nhj0cik48k7s3c81jjnu0mpfe/pepuzutozuvavinenibew.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/80006620673.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/20508575228.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/mesefizukuberagu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21e1cc8d70---teradi.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/tipexege.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/59df6cecf0631c284a201b545048cac4/78034758698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=best+cinematography+films+of+all+timePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 17740 bytes
SHA-256: c137751d666af060611cb16096547e65975717af10341ee523eb72605c305577