Malicious PDF — malware analysis report

Static analysis result for SHA-256 607c982a225c8732…

MALICIOUS

PDF

90.0 KB Created: 2021-07-03 23:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c7d592dd6489fab5eedf691803477e70 SHA-1: 7047709b10b2dd3a5a9c3e9664a87eed503c64b3 SHA-256: 607c982a225c87329cf090fc9f8c88812c253b7e22d68391dbec2e28d7c4d6e8
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://oniceh.ru/uplcv?utm_term=action+potential+of+heart+phases PDF link annotation
    • http://palyavalaszto.hu/teszt/upload/file/benaxajeniviwazuxala.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/lizuvatitika.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n7g0mfldufli68pjrmn1sneile/84926299421.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160797af73a623---sapimezagele.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/e4f36c2bc2408829b72bd280163dbe85/15984572804.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/tcd9kvef83kconrqmbell7o9nb/gatosobajugelutizuxun.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/a13287ced3b39414dea2f54a8945b7d8/desepokofukigeriw.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/18766170430.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/f5260a2df56e5d7cbe05f93c7b0dcca8/61364099495.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082aebae12d9---43067180842.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b923a6c36---wijedapogegivemofo.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/fc344ed98beb0c957a457729f8a15ede/81124451022.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/28841280210.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/lenexepepap.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7ea8cfc1e3dc5edb6800849686ff05c3/72938579913.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842ff78c31a---26335054548.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/62888040959.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/lapugawixepikibojisa.pdfIn PDF document text
    • https://memoservicesrl.it/file/gefavujawovozurikelon.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/1d22a3b24959d3fed427e3e00a66da7c/jobadisomoxoxazeg.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a375e353d7b---xuzavonukaxojigefiler.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/dfd4f3d8ba7240be4be810c42e73664c/mexekawamepano.pdfIn PDF document text
    • https://isleo.com/i_photos/file/nekobomupoxopapulifali.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11504 10560 bytes
SHA-256: f82c32c78511640d7b6556a7ae8db54cd571031981c1297ac038f93530b81e16
font_02_sfnt_off00012d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D08 17632 bytes
SHA-256: 5a2a91278d244d9d1102ddd9be072c2a23ff6b5d4dd8190dbb904e6c252d644c

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