Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb95284536fc639c…

MALICIOUS

PDF

88.1 KB Created: 2021-06-26 04:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b542ae6e554cd54d0b803260fa61d915 SHA-1: 233869d011ced8f26ff78b38b09a34d1933d5f56 SHA-256: fb95284536fc639c05564c0b64b4f73d5532dffc1bedc3e1a131f27329858e6d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

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://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b783d7dda31---nomenet.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4444021a3602bdd743d726508c921e37/niwenoporalidugo.pdf
    • http://studioturina.com/userfiles/files/rapugusemupovixa.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808c6305808---bawobuk.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16078b043f0a78---mapegare.pdf
    • http://amexeuro.com/an3_Uploads/file/xutixetapumekegewekiri.pdf
    • http://multi-accueil.fr/ressource/site-image/files/rotakewiporozikixubemaduj.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfd8bb89d---vugarumodigevonubakaxemi.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c73419c8aea---dujepisare.pdf
    • http://gruppocinofilomarsalese.com/userfiles/files/serowib.pdf
    • https://aimhc.com/userfiles/file/lajuviwodimafezu.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcdda0b901---rejatuvevekurijezotab.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608088a1bf686---5877573482.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609730a0aa69f---mokonulexumisefafunaped.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c427ac62f48---35760780913.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/5d6b60ab44cbf5a4f93ba3d789ea53ca/33929545774.pdf
    • http://domeinbeverdonk.be/assets/files/file/9117102629.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb4d01c54b---83637911193.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608867bce2776---14582962174.pdf
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/nugunider.pdf
    • http://karmand24.ir/basefile/ehotel724ir/files/50100588104.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/089dac33b0f7ff3999f30530c7d2fa3d/wowilamaxetomoletefiluje.pdf
    • http://vasamo.org/pds/userfiles/files/97065832924.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/ft2b9vk7rt614tk2hhpqt4a9m7/27743346412.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/9gn36v103pc07fmdteucjkb942/rakamobivupolexumavitu.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c28eadb0ddc---69192714904.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cs+foundation+question+paper+with+answers+pdf+2019
    • 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_off0000f0c0.bin
2c2d3bc9dae9d827210dc4d03c7c476db9d23cb0fdfed9c50f793b7ce07c5e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C0 11376 bytes
font_01_sfnt_off00010b71.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B71 16792 bytes
font_02_sfnt_off00012383.bin
69377d98b9e86bfce3417af37cbf3c82b78c3afeac91f49ecd7be78986b41bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12383 17276 bytes

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