Malicious PDF — malware analysis report

Static analysis result for SHA-256 5425059ce435ced6…

MALICIOUS

PDF

107.7 KB Created: 2021-08-04 17:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a600396a411ce3cfd331066cb05f3d88 SHA-1: f8edbd38bd9629229e7519abe660d8532ed877f5 SHA-256: 5425059ce435ced64566b696269ed956df95591f35b3374d3f2fda91ebba89f3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/xironefozuzorupawerokoted.pdf In PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/gisebezije.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607887b43ded4---13958014959.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2ba45fdf2---nerixifab.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/34935880808.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1l3fmgc9vnorct8h39k4lf0nm3/1471112562.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/38075883670.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/bacd8b93f70a3eb8dd6ffd1be0f1eabe/burobozemaseriragu.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/duxeloloxarubokakubopaduj.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/56152252554.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4369431ff---95127614191.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/47ef5cad5263afc37c0d2969245e9704/jigukukokusukuz.pdfIn PDF document text
    • http://hrudolf.com/userfiles/16545689969.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/pasixu.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5d713dd39036b2c0d33790eeb6f55bc7/52922149445.pdfIn PDF document text
    • http://devison-matras.com/upload/file/gewozolo.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/bbe40aec71da8cc8088daaa7daf1d44b/mijunodaxojoriwij.pdfIn PDF document text
    • http://airsoft1.ro/files/file/77214873862.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160873c9282730---98330648801.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/24806003923.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44e33f3578---dizujofapikokigireredafe.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/64f36d63648160bee45b4bcda82cdb66/83558078664.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/45a84a8b8fd055a4eb5d98ec34c8b0a9/voleripigezekunopa.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106ad17e6893---30673803531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=antonio+vivaldi+four+seasons+spring+piano+sheet+musicPDF link annotation
    • 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
stream_008_off00017de4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17DE4 19512 bytes
SHA-256: b988bb6dab0d0c6a6ac42b7cf07ed94ebe6ccda81315cc476394cba76b39d687
font_00_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 11212 bytes
SHA-256: 6054f1ae52a9c983c6ffed013c2ddc2b41138aab36f090499458deb5574c6d8e
font_01_sfnt_off00011059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11059 1940 bytes
SHA-256: 1e95c4ab730549863b93f79e2c73ec55fc03a14fb4f6dd5f348cf5d984689d0f
font_02_sfnt_off00011955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13167 30204 bytes
SHA-256: 56b7d3ae907d1a753250e32ea3ed4e6d1a9eef6b8a4828d9397da1b3743d7995

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