Malicious PDF — malware analysis report

Static analysis result for SHA-256 725d177209154a54…

MALICIOUS

PDF

80.7 KB Created: 2021-05-09 22:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d04eb2c8dd741ab79aa560d4b33465ce SHA-1: 776ce5d9c1bb8b4e6a10778a07881e86b234318b SHA-256: 725d177209154a546f9d83809f1027b338de34c0e5e384d60027e4127705da93
156 Risk Score

Malware Insights

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

This PDF document, identified as malicious by ML classifiers and ClamAV, functions as a link farm. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or phishing sites. The document's title, "Squeeze momentum indicator," is likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9244

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 http://ankurgroups.com/userfiles/file/lefikanekuvumam.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16075921f5696d---rukamex.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/132253ba296e068ad7ea498ee2955117/59840654626.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/64871277768.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df2f46c2c---24268444426.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607266cf892fa---mixidutusefexopugalimixif.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/9e7k17jphj387thc64qc8bi486/44876598847.pdf
    • https://festival.bg/fckeditorfiles/file/86381816222.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/67acf68de194816307d426a7dafc18b8/disujotawelinitujid.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092886443d07---59197965483.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/tah7e42hp1shhe9n0tgmsitilr/96397423016.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d27748891---tomagirijakutubipeloxisax.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/048cc938b47b1cb48d3c4c591aa8b3aa/buxotizedoxabigugexo.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca718a00d9---60720885784.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3d9c52cb4f3c5abf5b8ea1c6fc92ba40/lowokeso.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/b5c8837c7fd30d879255baaaf8076040/bopadugig.pdf
    • http://andrelandberg.com/userfiles/file/4917436199.pdf
    • http://www.opentle.org
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=squeeze+momentum+indicator
    • http://www.gnu.org/licenses/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000f68c.bin
d7b5b977b7f5dea35433674739d39a6f8212a8325fa2dfa8a91370bf7f1a035c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF68C 11800 bytes
font_00_sfnt_off0000e523.bin
fa41db588095cfa1c99498a305ff9ffc8a4d48bab1e62ac13eaee6f000c488e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5152 bytes
font_02_sfnt_off0001180c.bin
7994c9e2499c9bb7b60d6353cbd08f6b57a2bad9f3b1ec17f95c12ea19732b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180C 12608 bytes

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