Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe459afe998d8625…

MALICIOUS

PDF

73.5 KB Created: 2021-10-01 07:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f1e9ea9945c2cf1dcb9da45a2df66c7f SHA-1: 3ef70939d6eab7c3979c20266e3d5534394a7a08 SHA-256: fe459afe998d862580c902e1225062e2a203772ccc1a234c95408a06cb0807ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. The heuristic findings of 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' confirm the nature of the document as a lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4585

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://chcial.ru/uplcv?utm_term=pokemon+games+for+emulator+ds PDF link annotation
    • http://safarang.com/basefile/files/biveroxetinojifupexas.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613b26ba3dee3---73939739135.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/bd7cc56d28bdd7cc350b3faad4b2fade/rakitexomegapanigapegan.pdfIn PDF document text
    • https://investkwik.com/userfiles/file/52758213843.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/95924523377.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161369c7dae03e---64517671353.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/68103579477.pdfIn PDF document text
    • http://sungder.com/upload/gisabujewikujanemalas.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/bejevovubufudenirosofilik.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-09-02/images/files/15441272499.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/5005878650.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/nuguxozoz.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/79852745369.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613489cce12c0---fejoseritasifolegiruk.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/c963072d892ea4a17b82e23fa6cd3874/89423531361.pdfIn PDF document text
    • https://sts-cct.com/app/webroot/userfiles/files/73297842557.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b0f3ccadb2540b6fbc07fafe78911b85/67638026445.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/vonudumorosefagoruv.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/65768058726.pdfIn PDF document text
    • https://roshnaai.com/ckfinder/userfiles/files/92236426820.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/66340565183.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/14042663377.pdfIn PDF document text
    • http://sdds.be/userfiles/file/berusiravivesiroxelaxuwi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF77 10796 bytes
SHA-256: 9e6c1df905c8614488e034223a855590cd56e1895fded6844b173d4116919459
font_01_sfnt_off0000d839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD839 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 19952 bytes
SHA-256: 89d5c41909d8d7a998dde6ac6120e2b13f873602eceda645e2ed89ea58040c9a