Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f03dad55e177e8a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-14 11:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aeed6efac95a9f12ae00e0981339ca93 SHA-1: 606dc0bad2ec183a7deba3f451da923c2ada7819 SHA-256: 2f03dad55e177e8a9285efb713eed7e4ffd8900412ad7f1fcb4272bad3bbd380
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains multiple links to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The PDF's structure and embedded URLs indicate an attempt to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4edb34173---57948478377.pdf In PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/kmufl12d9t8er4lb81cemnfl2n/71598654446.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/92776518601.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/divigopewopabutu.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/nudipot.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/voxitavuwalekoxipod.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/90683886948.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/34153465242.pdfIn PDF document text
    • http://www.moyekolodin.com/files/siwedupogitakeza.pdfIn PDF document text
    • http://telek-trans.hu/editor_up/76806519486.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/fijaronudizoravo.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/97344510386.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0904/45037969ef30cff1aa49ebf3fa49e3f0.pdfIn PDF document text
    • http://michalpavlicek.com/uploaded/file/40813867304.pdfIn PDF document text
    • https://cape-electronics.com/media/file/depafagipelex.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/69207395168.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/pifirazi.pdfIn PDF document text
    • http://sooclose.eu/upload/File/70937784809.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/47809479235.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfddebbc31---gosoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=on+the+road+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000db13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB13 17956 bytes
SHA-256: 246b049636b26973a16b94525d2a9adb78ddad42417c586a2378ff001c9b1454
font_01_sfnt_off00010a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2F 10444 bytes
SHA-256: 8313debd7ff0a8faf9ff6f306de0ab2c8bd63c0cac1bb29c855a7b9ee62244cc
font_02_sfnt_off000121e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1