Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4a66b4ab842d90…

MALICIOUS

PDF

144.7 KB Created: 2021-07-01 01:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b052516928f48e3ac7d9a662611e56dd SHA-1: 9ee3d27aa62947d4b1095a786017794ee372ab9f SHA-256: 2c4a66b4ab842d90d2e2084eca8b8f8684923d4e54087a0815a24db798f69991
156 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 contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or appear to be disposable hosting. The primary goal seems to be directing users to these external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/xenijoga.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e64b413359---35873697114.pdf
    • http://urduhadith.org/survey/userfiles/files/webezebujododaxovogunuv.pdf
    • http://pnmanagementsolutions.in/uploads/jibukuxadezosarepurobaxi.pdf
    • http://skupka54.ru/upload/m/jaxibeboraxefaboziwisow.pdf
    • http://ketoanantamhcm.com/uploads/files/jexisunutopat.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b4e08f1464d---20014128240.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc8c52490---kakodisagafutisirusex.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc2b62c42ae---jagofuge.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c3f4ee851---44803286525.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/eac09e8ca4cb00170b3f9f8ad92dfa98/sukepuvikepuwobu.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/2vslu7n2lvds4n000184nv7ibd/verizipogasixetewapejebep.pdf
    • http://architects-desk.com/uploadsfile/80367414320.pdf
    • https://santchavarabed.in/ckfinder/userfiles/files/gufipofizifosir.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c4959a99ef3---mumulekevujurubevizivudo.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b78b2baeb2---zonisusumarepeta.pdf
    • https://2acontractor.it/images/file/rujaga.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/f7b760c4c7beabd7a77b7e20a697639a/wevorasosed.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/fogotefuxesebigeritari.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/10161377775e0c46bf253826cfb0233b/42328961219.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ba0154358a11eb1e4e902741edb6cefb/petasetovuleluvoguludo.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2478cb202---86968928151.pdf
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e4edf65ccf3df5f9a5561fb011763c1/woxupebuv.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=yet+not+i+but+through+christ+in+me+meaning
    • 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_off0001c4dc.bin
258bfcae69dda97c669002e05992be738f7feeaad0691023269d3d429466564e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4DC 29816 bytes
font_01_sfnt_off000204a6.bin
48d9c1aca7d4eb10cd66d1a353b399c8f248e00128c1b73b53d22776ed251b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x204A6 10852 bytes
font_02_sfnt_off00021d86.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x21D86 16792 bytes