Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a974ea03fe8ae45…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 04:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3569724cb1260308d3c621ac188b135c SHA-1: e9947dbab35921d760739722cad9ba79ed0d1db3 SHA-256: 3a974ea03fe8ae45d98fe366b2e2b2512eed9b18655f7d7c0c77949f9d77a3d2
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals numerous embedded URLs, many pointing to compromised WordPress sites and acting as a link farm. These links are likely intended to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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 http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e0f7001a4---90827870478.pdf In PDF document text
    • https://masihpt1.com/contents//files/80903434554.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/xopuropakifuzanafomev.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/7067480938.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/627a4c47c4ef59636ffa3ad34760d1d5/75655759826.pdfIn PDF document text
    • http://dh-cell.com/ckfinder/userfiles/files/lowosutedok.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/fibid.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffcf4ef5d4---rusiwoduwexepabitelogola.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6cd71a95c---moriwatatetosaganowibufov.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/49003504349.pdfIn PDF document text
    • http://abnicum.com/files/file/67128118135.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///dazerojuramu.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/39908729573.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/25588400687.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/80170564340.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/53764783111.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc2e2afbce---87534662162.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5763e0fb39---59002636002.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/40d88ad27459fef9539c89c84b580414/xanegazepozaradojuvosunij.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d144536732---7838241658.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fca0bf6ea---lamofijomupivubutesifer.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/gugedonikodidawironugika.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a264823aa---58644457947.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=discrete+uniform+distribution+examples+and+solutionsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEB 19332 bytes
SHA-256: 34070172bd6560a79c4c48082964e28efb5170d832b797a00ef1bda240c5d822
font_01_sfnt_off00012e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E20 11124 bytes
SHA-256: bf41481d4e5dafae60a8c518fc8e97b46fa1c3a9bc9ec9127ec7e8f79c727882

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