Malicious PDF — malware analysis report

Static analysis result for SHA-256 e474d25388066150…

MALICIOUS

PDF

80.4 KB Created: 2021-08-25 01:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c5abb12e672b01480ef2a38257b97668 SHA-1: 22b1e7197ae0a8c7c283dcf6e17e13ecf73c4984 SHA-256: e474d25388066150c4caf2f373eaf7a32b5dc6308756c7f1062a596c9f1c2488
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories. These links likely serve as lures for users to download further malicious content or visit phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8576

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 http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d0619fdc8---livoge.pdf
    • http://cw-cut.com/uploads/file/zebegol.pdf
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83332297198.pdf
    • http://henskeschildersbedrijf.nl/upload/xudikumag.pdf
    • https://volnynaklad.cz/data/file/nagavutatama.pdf
    • http://dsrental.com/userData/board/file/kasisututarofutagogawami.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098206861447---31743032190.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5cae288a7---terodonujadepar.pdf
    • https://galerie-louise.be/userfiles/files/70725317498.pdf
    • https://egca.fr/userfiles/file/gigimapawod.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703bf796623---75242746118.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160923171ca6b8---fuwuwadiveligata.pdf
    • http://akcjonariusz.com/UserFiles/file/81828012256.pdf
    • http://techscreening.com/userfiles/files/89484360323.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f26509bac85---58780405848.pdf
    • http://visit-pune.com/userfiles/file/30314218132.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161152827617f8---litixakonopober.pdf
    • http://pantryscan.com/123cars/imagefck/file/gavodaxijusozifa.pdf
    • https://okazionche.com/files/rabidog.pdf
    • http://tfforming.ru/d/files/56510033098.pdf
    • http://haozuowenwang.com/imagefiles/file/kesolurumofokulugusevubo.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/2763398c6ad9d8071d8deb64340627a3/69929841529.pdf
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/rewedofenipeduvanagirurap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=impend+in+a+sentence
    • 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_off0000e43d.bin
f694f25c466c6f4b81c98c191f7ceaf5906cb70f4fbc38cd79b4fe81d33ccd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 23292 bytes
font_01_sfnt_off00011e38.bin
1c6848cf8e167291093235b34178cd10c171ac9db0f6b05b72421c36ccf3f52e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 3052 bytes
font_02_sfnt_off00012abd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABD 16792 bytes

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