Malicious PDF — malware analysis report

Static analysis result for SHA-256 3460cc264fde7b9e…

MALICIOUS

PDF

54.1 KB Created: 2021-09-25 20:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1c325aee26016c82f43bf527e053043a SHA-1: c1bd1b3310d944a95058ac21a4eb1e3696b48f58 SHA-256: 3460cc264fde7b9e6858679e8bf73cd058c58c81fa494696e7bcf1fffe852cbc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL distribution align with a link farm designed to evade simple detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8059

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://penzionradvanice.cz/res/file/rekepariguxobivegoxivu.pdf In PDF document text
    • https://dmshospital.com/mm_engg/files/11904311534.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/11491626880.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/66957881097.pdfIn PDF document text
    • http://entrackintl.com/uploads/4927130801.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/sofumanebajaguvivakid.pdfIn PDF document text
    • http://traviet36.com/upload/files/gipudusezupuwiwitalotap.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/92081065703.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ec0fd5d7e---75996942251.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/69249201224.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb9ff2c8a7---95454129851.pdfIn PDF document text
    • http://tabletopad.com/images/file/tasuli.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/kalavedonaxis.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/005db92f46ab0a0ad4c2cdf8f62663df/mifelegemaguvetakafabe.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e8a37b45b8---sagevapilirezokopitaz.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/7606049395.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/47438163285.pdfIn PDF document text
    • http://icoenergia.com/userfiles/files/lenuzoxog.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/80447514356.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/97403522031.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/96816656450.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/53988571774.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/309231641.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/34419650519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=hum+dil+de+chuke+sanam+1080p+movie+download+worldfree4uPDF 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_off0000c00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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