Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd4094e2a9b53ed…

MALICIOUS

PDF

63.6 KB Created: 2021-07-23 10:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: beab819b39d6755956c40d2cbc00cc92 SHA-1: 13acabce03b5b60bc781b3f9752c121dfa973bee SHA-256: bdd4094e2a9b53edca4eb997be11388d7b141e2ef8f3973d318a4bb115287200
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9117

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://thaiwoodengames.com/files/upload/files/sabigebakidavuroso.pdf
    • http://agcslohian.com/userfiles/file/13690273716.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/8o2hrp7lgu2s2r4uqqmf8iriep/6698764938.pdf
    • https://ccskin.com/geektic/files/ziboxototupetogagowobidi.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094436945288---22345001295.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/96bdf4fdbc429c7b7d54e738bbd17986/6766871897.pdf
    • http://dzwigipoznan.pl/userfiles/file/97707970187.pdf
    • https://khabul.mn/mmpa/userfiles/files/95972299941.pdf
    • http://nutranghongngoc.com/media/ftp/file/26433180909.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5130b2a2---tegabikalupebeguta.pdf
    • http://aircond.md/upload_fck/file/didita.pdf
    • https://aarhuskortet.dk/images/file/55472063829.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608766c9e7a54---80970775776.pdf
    • http://dragonera.cn/admin/userfiles/file/rusazezononeduvusug.pdf
    • http://www.lugashotel.com/data/editorfile/89753052459.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6896063c56c2a9ddc43cfc76d91502b7/47380354997.pdf
    • http://ebrinteractive.com/userfiles/file/71656513598.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/blm3j9mnl1352m1fau9t56unor/sejimamog.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/26822704164.pdf
    • http://studiogaleazzo.eu/userfiles/files/63495255313.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/0ujjjliee2ja6grq80i5p9hgm9/41263379447.pdf
    • http://yevres.fr/ckfinder/userfiles/files/21285165173.pdf
    • http://email-database.info/userfiles/file/78150973841.pdf
    • http://tlxzkj.com/uploads/file/251255146257.pdf
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/86907040018.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=gate+previous+year+question+papers+with+solutions+made+easy
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c864.bin
793e86e54198d37691873895e6288a7caac526a858e8c05a076cad41c41f56a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC864 11208 bytes

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