Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbf95012e91559c…

MALICIOUS

PDF

71.4 KB Created: 2021-07-01 15:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e6c1faf4f28972512f01fdff3d8b28d SHA-1: 0df2b7faff529bea7c5d0470a641f9b19b9ccc8d SHA-256: 9fbf95012e91559c2ec0b7a896996cab1f6ae50dd8afbc8d7f0da693ead24296
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple compromised or disposable hosting sites, such as http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1fcd2d73e---xazaruzipen.pdf. This pattern suggests the document is designed to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://zoncmswebsitebeheer.nl/files/editor/file/3416808042.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/1df0db3b14f8372b536addaa790ce63c/59607203410.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/ab2d75ab82dc0427678b23b62630f7c8/rifig.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ijomgs435hcbpnlq9uln327357/votozarexozamus.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6fec509c4d880e9b1d8cd6c819c06988/96261811611.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/67f455a56bd9ae6caf6a50af629c16ad/fakodimebeberor.pdf
    • http://phannhan.vn/files/usersfiles/files/42846761539.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88bde3f511---nevaveburixi.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/97105524a0d6e7b10ecb705443d8b524/79615812639.pdf
    • https://eobliecky.sk/userfiles/file/womisiki.pdf
    • https://al-farh-iq.com/upload/userfiles/file/famejapagivodigano.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/5lb36rpo9ev8tt7ik226bb1l96/66425320305.pdf
    • https://plagij.at/ckfinder/userfiles/files/4107020699.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/kiwukoxogegitizu.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a4clirph1ckjlr8l3j9uvv6puf/81806102696.pdf
    • https://kis-u.com/page_data/file/20210614075744.pdf
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/puvasakebu.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b9b4187c---resufowifanetoxek.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1fcd2d73e---xazaruzipen.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/gpds110adt500i0e2hkha19t54/kubiwagomogimejobap.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c903bc500---31858610861.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=natural+foods+near+me
    • 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_off0000b7b5.bin
ed9cddd0d4c9601b6b9e4f0ac09fbeac37731d3fdb24c7b6bbb7dcaec0540c85
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B5 10500 bytes
font_01_sfnt_off0000cf9d.bin
9908cb63f9662a3efa21fc66515a38825b4aeb802f9f06051266485cdd64f87d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9D 15964 bytes
font_02_sfnt_off0000f870.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 16792 bytes