Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a652075de210fc6…

MALICIOUS

PDF

103.6 KB Created: 2021-06-27 00:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b86045c78dc7b5cd3c6759c571da20b8 SHA-1: b5176ebe130e7ec11394b297cedfd4ff0e1eb6ca SHA-256: 1a652075de210fc6033d19172dc6a5851359ab4707eca1c53bdd89885365ba72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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://crewmak.ru/uplcv?utm_term=latin+verb+to+go PDF link annotation
    • https://nonbodepsg.com/uploads/files/logoliwonulikiweni.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a111d3b7b56---woxonuzokituxowelokuleku.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a084fa67737---kixuvafagurasudofevikopu.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1e6151f14---19702844972.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/8djbdij8cd162frbqh13kt23df/pabatilukasujo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a402a412e---paxapore.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/589d60ab7f42bcdc5c264fcebfae63f2/vujukimaledugu.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ovs5teka6dluo826eqhctol0vt/84069365565.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/mq0lje42o0peeegldv8jll1p51/53346633937.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f08847a67b---93538775412.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb83ee97c29---sigatetuzase.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/52781358530.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16082577782152---rexopimokuxizowaposotateg.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16076463d1dff8---pelimuwemuzotijazafi.pdfIn PDF document text
    • http://veivel.com/userfiles/file/43858425359.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/p1eifraen97n7gldf0udbp5tub/jonuvokalivejomesurozi.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/kegexukodusazasajas.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c30de713---jinawujekiragadowokizik.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f806910b6---xezerawekawugoxeguporajo.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/sifemobekise.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/gakekevogatuworot.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/26e8n6tl9b3ocb51l19fubmqh6/24623183657.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/e9d56af2168b3e982c21f937ce841ce0/55979189822.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/61525690542.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2F 22216 bytes
SHA-256: 3a3b4710ba461100fba7e957a4bd439ab66876cd4eecd0df069f6f20fb481ac1
font_01_sfnt_off00014344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14344 1920 bytes
SHA-256: 347271f3d4773695779b388bd4d0f7e52b6caa701f7ab7c4befdd5983036d79b
font_02_sfnt_off00014c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1F 10232 bytes
SHA-256: 2566a2d68ed484935d951224fdca57e1c3408e536a6eb70f20b14441fa179936
font_03_sfnt_off0001633c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1633C 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_04_sfnt_off0001784f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1784F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1