Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9c2247477ef9cf…

MALICIOUS

PDF

89.8 KB Created: 2021-07-21 11:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 15ab8efc3623c0585c4ac6a96df9c575 SHA-1: 8752c936b6ff48eed7699639f1473a0b7225aabc SHA-256: 1c9c2247477ef9cf8abc489bf2bc0a8aa65aea82610e9b59e21a4aa41aace4bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The PDF structure and embedded links suggest an attempt to redirect users to external, potentially malicious websites. No scripts were extracted, but the presence of multiple suspicious URLs indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2214

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://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/61u4mo5afcaj03kiagtpcv9mei/maduwasuratapikumazage.pdf In PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/vipakawipumotoledafos.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/bugifowinosurukusepum.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/3ded6b3bfc64f56a35149154311e380a/71340351568.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db31955974f---lurijerufonefujomeriruwo.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/nosenoduwebolokixi.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee0727b4c---26520774615.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/34t079mssqq0vlmi4kcatjhj6o/22885872085.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/b89b0c68e6c46ae1a018f6a44ebeba7f/ropeniwibonula.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/6uu1m0k7mrmk9mn62fjaajlqdn/49584011936.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d19666ea1---62114650167.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ugmojprggguame7plukbl18pdd/87969453428.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/90300949353.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/c33138e77a399ceaf07ea93e7d1d5b98/piwadurifarukusamuzod.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/pupupoxosizujamu.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/1511136516.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/46055068049.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/73985363596.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0a938c63e0bd7321c18e17bf965609fa/morukamuxigomonutibid.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/6jgd9vjt2lmo0e15dn0hd7q3ls/49790003718.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/soruganusowetasorumekumif.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772f669d281---20840771690.pdfIn PDF document text
    • https://abeess.com/userfiles/file/97393878802.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/um96hkktueplv8cni1pnrvibph/31934306147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=subject+verb+adverbPDF link annotation
    • 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_off0000ffa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA7 21396 bytes
SHA-256: 5027c3c08efbc5a4b3cd39745669c7cdc1b307a804d709597a333df14fe614a7
font_01_sfnt_off000135b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC9 10344 bytes
SHA-256: 95d0991442ca1120daf5de247ded0fb425d07137e3cb814c6bb94f0f832b5d75

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