Malicious PDF — malware analysis report

Static analysis result for SHA-256 954a5e80fe4677f8…

MALICIOUS

PDF

72.1 KB Created: 2021-07-29 19:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bda5d5c44df8b514c64ca3a9a820dc73 SHA-1: a918b3d9f804b243ad776d32fb15438c792e7e88 SHA-256: 954a5e80fe4677f8d5db51e68212e55afd33e8b37b6396ae22d40174073730fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing to multiple URLs, some hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL targets suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8859

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://a-1commercialkitchenservices.com/ckfinder/userfiles/files/68995069526.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e997694898535ac7ef934ad88900a099/bakewiwazusoz.pdf
    • http://oreade-breche.fr/userfiles/file/mexaguxojuxubogosot.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5d6b60c40---kerodukodabipi.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a53947885bd---58474809680.pdf
    • http://shreyaghoshal.com/konadnew/userfiles/file/jewugo.pdf
    • http://turagent007.ru/userfiles/file/58122175863.pdf
    • https://noventa.cz/media/files/file/fetirewaleforovarowezizi.pdf
    • http://taiwanglassgroup.cn/userfiles/file/87778341272.pdf
    • http://goodslib.com/userfiles/files/12181309376.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/bdg82qvdpqegdeseokht8a8hv5/kenikivorix.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f462f11250d---7486060042.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b1537a16e2f---87400657569.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d36879cc02---24247088915.pdf
    • https://eldorado777.ro/upload/editor/file/dobipatodebeniwoles.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/bad46b7k0evevpghfbnhrio2ij/sixukawagumatex.pdf
    • https://wegofa.com/userfiles/file/49190211587.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/j7irm7li7he0t2confp9pmpd5f/fawabifasagigozotor.pdf
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/d35bc6775dbcf9be67abf4aea8f9a219/32937324120.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8196f5e5cf---fadivi.pdf
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/bipukafuparifebakite.pdf
    • http://coreaad.com/DreamDataUpload/file/39813683110.pdf
    • https://abe-rdc.com/userfiles/file/fuzadaposalanitigavire.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=madhura+naranga+malayalam+mp3+songs+free+download
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c289.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC289 16792 bytes
font_01_sfnt_off0000da9b.bin
cad4ddceb7c41e93e4211db4972447eb3edd8e10dc0d536efa41d029ec638a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9B 16476 bytes
font_02_sfnt_off0001055a.bin
5ee39132ad2edf6e0af1f7cbf5b9409dc76bf0330363cf43ce0e1ff3323914bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 11220 bytes

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