Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd443bfe18ae1d44…

MALICIOUS

PDF

85.0 KB Created: 2021-07-03 00:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f538adf2ad95f769c44d7c613c00fca0 SHA-1: 1f1a5521e5ac3af49839864dde95c1c720fd5be0 SHA-256: fd443bfe18ae1d44bca32d85736dd68fdcd92f1536bfabd0ac4ca0039a87ee26
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier clean score 0.0115

Heuristics 5

  • 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
  • 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.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8107adc17---vurafefowubu.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/bbt6kjn80l753k7tldqelbqecm/dopikitirowirazusimorim.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7ec89bd80---belimijujuro.pdf
    • http://k-souz.com/userfiles/file/80715436166.pdf
    • http://chiengthai.com/file_media/file_image/file/ruwuvukero.pdf
    • https://ferado.vn/userfiles/file/bifivevunupepukoxikezim.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/c078e778638707ef5a2a68966de9f79b/98509034243.pdf
    • http://elijasprojekts.lvfiles/file/10584493397.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c7354644a---pokadajepotiliwet.pdf
    • http://yaqeen-eg.com/userfiles/file/24590720526.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0434bd705---65204608628.pdf
    • https://vsetinrally.cz/userfiles/file/mipabewirutonofukuviri.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e129df27db4d376d5bedf0f751a04d6e/12657717796.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f58e0ca316bb1905db8651cbb32737ad/79218656860.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/raa8f06epl7ep60irjp09f6dd0/94382520475.pdf
    • http://citadelcaralarms.com/userfiles/file/85666047576.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3b0fe72cd9---bejogeberaposazajojo.pdf
    • http://jar-ted.pl/file/21818811810.pdf
    • http://gayaarchi.com/userfiles/file/20210526152609.pdf
    • https://santchavarabed.in/ckfinder/userfiles/files/33872043322.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/7uug416sn5f554j4ac94b67ec6/laruzetevuwesuterazoza.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/b70e1eb187obcq3urus03qd2e3/biredofak.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799daecf4c6---gomukonutarotofizu.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16076eea1f4088---wexed.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=influence+47+forbidden+psychological+tactics+pdf+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_off0000efa9.bin
f5a57567eae26c232fa675d285114a50d81546de66e802fc7020aee4157c5042		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 11420 bytes
font_01_sfnt_off00010a4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4C 16792 bytes
font_02_sfnt_off0001225e.bin
839264d04bde773ab0a2b17c2df4687f9110f0240d7747eed55ac67ad3464c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1225E 17292 bytes

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