Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ff39244e905040…

MALICIOUS

PDF

63.5 KB Created: 2021-09-17 09:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35e57554916b3e0762ae933931dd1c1b SHA-1: 683110c1725149c2a29b3833e695a712848788a4 SHA-256: 65ff39244e9050404f1b05ba34651fc308d85601a843418b8826415a85c12806
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7270

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://wastran.ru/uplcv?utm_term=good+ringtone+for+android PDF link annotation
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/52d4e3d2044ec5ba8f366144915e7f48/gakatuxinizijopukinule.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403b35504c3---pipawuzojoxazomizamodad.pdfIn PDF document text
    • http://samtle.net/ckupload/files/7319094110.pdfIn PDF document text
    • http://juditphotography.com/picture/userfiles/file/19226769297.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/sagumetepikukeziga.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/8245677116.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb12843496---jufefemunulozesola.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/rikate.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/95756762757.pdfIn PDF document text
    • http://elard-group.com/ckfinder/userfiles/files/75736676290.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/95675077397.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161442efe70cbb---fivimawepafulatugaveser.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134bd246379f---11643387913.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/53477004697.pdfIn PDF document text
    • http://pegasomeeting.medcoast.net/ckfinder/userfiles/files/jorufa.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/36741159751.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/10389316582.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f15f4b1454---bojefavulazukimos.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/77948227102.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/ramidufezipipo.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/477906887.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/sumedutasaregamunufibaj.pdfIn PDF document text
    • http://bimore.vn/webroot/img/files/52308231440.pdfIn PDF document text
    • http://atek-ent.com/upload/file/13797712405.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/76572341603.pdfIn PDF document text
    • 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_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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