Malicious PDF — malware analysis report

Static analysis result for SHA-256 c57862383b476cd1…

MALICIOUS

PDF

58.8 KB Created: 2021-06-13 05:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 563afee296b80567a44d43563e4201bd SHA-1: 1fddf0aea615dff4ff22d29a008a5e8bc6baf541 SHA-256: c57862383b476cd171d8f6536659eb67db4f9ae5557eac8acb100cd01215e322
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress upload directories, suggesting a phishing or malware distribution attempt. The presence of the 'o mahi ve song download' string in the document body and a related URL further indicates a lure for potentially malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8237

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://huntic.ru/uplcv?utm_term=o+mahi+ve+song+download PDF link annotation
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12d1ec0675---84106390828.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/51740679724.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/2bc2aaa2da5d8c41a420a812b1a804a5/86640347468.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/pozusosesa.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/93638063312.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/dolikodu.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83af4e9dbd---67974839097.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24f97ea3e6---zudidalujabusefejos.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/f37daa3f9cab0d6b3792d16a875a1f31/kiwuxikiwub.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/cj3u9ni1las5jf8g8jslak49an/56557650279.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b0cccace5fe337c8171d417c49bb27d/niwediwutoligasexudid.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5ed266dc0---fugubitomufovukevukig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 5320 bytes
SHA-256: 3125304de738eb442efef1d7bc58d82c7a89e888638de277db662143306e797d

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