Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc2cfe10f833c12…

MALICIOUS

PDF

73.4 KB Created: 2021-06-26 03:25:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f2e0d9232ee1e498675f516606e68250 SHA-1: 64a4d3ec0eeff21aef60906ba49286c0828c6807 SHA-256: 9fc2cfe10f833c1292ae99322940eb0370f34f54185a85e90440dd917ae39776
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple compromised upload paths suggests an attempt to obscure the true origin of malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160852a556321e---86963153028.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b758e1d7b7e---36061996852.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075c3aee8789---6122886720.pdf
    • http://ideas4mypool.com/userfiles/file/gagawoze.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/4de5861298631e163eaa8f80a8ec6daa/dedivelapefotef.pdf
    • http://catgarner.com/clients/873270/File/dokizarisef.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f31669fbd---47978205985.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c872fe3a83e---6930458366.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/ae9bab789c8c46a3b3f2a92cac59f773/basozokidobawiborunet.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/l9td43a9niege7l9rc02058gen/kozamufute.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607308ca3c3e9---kagawipenezojetar.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dumojonusik.pdf
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/78199388165.pdf
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/8341905095.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/4740e0b4b8d425904f474e51a9d6baba/26712939315.pdf
    • http://bensonlandscape.com/editorData/file/80745092083.pdf
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/cbf6pfv33a35crijhedn3j67js/zujuxelepo.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8d9cf1a15---71505237831.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/7anr4gs3m077krbgunh2fngf42/1044739790.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a8f08e3aed722bf023ab16169bb9da82/6439177954.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/40241954828.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2fde186b7---11923749802.pdf
    • http://saokienviet.com/uploads/image/files/rorimevopemedopureledar.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=yards+to+1+mile
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/4518e88754d82dd278ad21b3ed6a8ed0/46069818583.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • 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_off0000bd60.bin
ac2c3685c990af742273e33d6a85b22e532dcbeb574d1f29374952570bedfe03
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD60 10340 bytes
font_01_sfnt_off0000d4be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 16792 bytes
font_02_sfnt_off0000ecd0.bin
3c83cf8924802e6c4cf5917399f60efaa75e1ca81da55d4f57651e5b7d9b5f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 16472 bytes