Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcff362e39af4076…

MALICIOUS

PDF

99.7 KB Created: 2021-07-02 00:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce60fd181b46fcefeb39c5e427d259bf SHA-1: 3b09f54a5ad752b066f42b061f4cf74aa9b639d3 SHA-256: fcff362e39af40761784aaa19ba5bd8a8f5f49200bdef5b4d927308583b027a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://pphu-joanna.pl/fckpliki/file/motipomivopikebulepaga.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/234ebb03b1ee252b72cf25f3b24477e2/mibaloxitoxijijakizel.pdf
    • http://studiovalentini.eu/userfiles/files/61721576191.pdf
    • https://powermailer.in/userfiles/file/dugopomelezufarisatasigal.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25fe6e763a---27862464616.pdf
    • http://strategie-online.net/catalogue_dynamique/file/kuxuzixumese.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160944d287211b---mudujulifawidoxazutusok.pdf
    • http://chaitraglaze.com/uploads/gikagifidekebovep.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ed24a8a2edfe0f7996bcee3b1ec5facd/xelutorejim.pdf
    • https://egokituz.eus/files/galeria/files/bizuwomixazebufozusemup.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcb3fd84bf---gudokubex.pdf
    • http://ccspatti.org/userfiles/file/majovavopexisazego.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091cc3a55ed3---93041096642.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986b75c039b---5335481079.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f9523f31cacbab33cf5cb82091eb128e/46374659310.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f1c11de0---2714028114.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788e379ea07---dukilanipazodor.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d479c274---5683497808.pdf
    • http://viermaalh.nl/Bottesteyn/Site/afbeeldingen/file/torudijopazevike.pdf
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/7cvbrh1rt9l9cds85fcjnvqp1i/mixezososikanuv.pdf
    • https://open-call.fr/uploaded/files/gamoriza.pdf
    • https://eravukappalpalli.com/userfiles/file/juboxitupopegagonixekoxu.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b110f5e1a01---29669610037.pdf
    • http://aaaexpressac.com/userfiles/file/19230809647.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609781edd63a7---divowanaxovozaf.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/376ec4c4bfba6f3d8a5b265084411efc/6221023009.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160989bbc14847---15349184943.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sabo+meets+luffy+crew
    • 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_off00011a05.bin
ba63084c4bd37268fb66216e6cd8c5ccbb7b94910f56f5875fa9d3ed21fc56fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A05 20748 bytes
font_01_sfnt_off00015038.bin
8d06a14bdd98cf1d218275034c401239a65f551fc89396994de9535ca566e16e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15038 10816 bytes
font_02_sfnt_off00016954.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16954 16792 bytes

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