Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc76afc14db3853e…

MALICIOUS

PDF

93.0 KB Created: 2021-07-06 13:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 790e4665e95ad6e2e3452151fef490bc SHA-1: cb11c387300fa12e6eef92ea435f5c05eecb837e SHA-256: fc76afc14db3853e363636ca7fc05e6bfd464ebdfe78849717ac273ae5145949
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://honda-vo.com/upload/file/1151178919.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5f0a7791f---79027353421.pdf
    • http://jtour.vn/userfiles/file/85316604221.pdf
    • http://tremonttemplemacon.com/clients/862779/File/pipijimasosekefomovukata.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/bid9kgug41ikb4hqh3bqijb6a6/66603479504.pdf
    • http://karunb.com/UpLoads/files/98216859344.pdf
    • http://laser-piskovani.cz/democms/userfiles/file/batisuxorazapanarovemol.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/dc3ffb1e700ea0f8e3098412ae84e69f/wosupagitedokasivanejekuj.pdf
    • http://faxik.ru/ckfinder/userfiles/files/kinepaverezijajepowimina.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075797cb15d7---pogiledotowipuxawiloz.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddae3ba42d---mabejajovipoko.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/33gi4kcl7rc44vrantesdptok0/58638186103.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a79b83969---tenapipagiputuwimibakul.pdf
    • https://travelinnsuites.com/nbloom/fckuploads/file/nasopuxikinilenadelow.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/06032aaedbefcf12acb9270028b8d9ea/mawuligagojiv.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e002bb421c---41293251359.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4edc35fe2---kukiza.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef5ba38f0---xixeteranobumimetilunej.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997cab3959---96116652439.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607688b7dfe1d---14530074907.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e59114aa64---33851640685.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/he4a51crucqv3vnep9rvvg3q30/sogumagumoxuwasukosoxebu.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b16f145191c---83012307514.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/5u31jlb798itqfg7nl8sgi4976/54606828034.pdf
    • http://cloverpark1961.com/clients/6/6a/6a73a08bb68f643008adb5efbbb44e43/File/jojida.pdf
    • http://orikon.net/Images_upload/files/sidunixazujexol.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=newton+first+rule
    • 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_off00010890.bin
a15eded5c962991960ba60d3c7e752a5e9d70f4d13ce22e4327174345fb17096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 18080 bytes
font_01_sfnt_off000137b7.bin
13476bd8a10f955941f56a28137140a9938e0649b2b8c610f34de8f01f4ec688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137B7 10208 bytes
font_02_sfnt_off00014ed1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED1 16792 bytes

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