Malicious PDF — malware analysis report

Static analysis result for SHA-256 915ce2d6c6891e8f…

MALICIOUS

PDF

102.5 KB Created: 2021-07-02 12:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccba07a62c00bd16e6a1a01ef28ae89b SHA-1: 6ccfedce8ecd32fd9da86534f36850b174e4f259 SHA-256: 915ce2d6c6891e8f1f9fca7066f90ca796f2514f2da7e70db5bcb8ba7d76ce2e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://medvor.ru/uplcv?utm_term=21+questions+to+make+you+fall+in+love PDF link annotation
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c686003fb---logepaxejuluju.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/6d4cd9d8c1593dae43e54dbc57df85aa/xumenovowigilejewinaji.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/80290b428d1044b8e65b5ee19d36497d/risexivew.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b46fcf8b6a9e4fb62a05eb05ca4beaac/nefilutawikemobawamuse.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/jvpom40u0p8cc8hddfunki9303/15686465182.pdfIn PDF document text
    • http://haphadoor.com/upload/files/59483479492.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784682eb951---wawepux.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755046ca468---wanulabovaxutudexuzatog.pdfIn PDF document text
    • http://egonseetour.com/FileData/ckfinder/files/20210616_2753CEC0D1925E8F.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5f34e3915---tokogoditoxo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9397acee4---liruwadugubaj.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7f910ef794ff7f0584bfb0694378dfe5/riteratowamapuv.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/cpvc0kbaqi3oe712d754i0ieqi/pojamatefari.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4aefa0826dcf0fce6bec34490387c9ce/fudiguroronizideve.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c9855d85c---53408098138.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106162248174406.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c63cd5b772---7803995158.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/povmo1tbav4lhr7uhc7jv3u474/73882437811.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083458c11374---7533664345.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1023e2d18---loxawogimadobutivufik.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc2a4abc31---23528376634.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///bivoluxabirif.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609006113c3ee---pifimereredevezovatozu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a84ef0b4e220768076ec7a6ac5dd6f07/badatesimelubibixaruru.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_off0001300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300E 10868 bytes
SHA-256: 2fa6dddef50007e182a8e7513f3f2f73b10a913c017a7d60ee1ee798b5cdc701
font_01_sfnt_off00014951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14951 16836 bytes
SHA-256: 36f4eabdc4beb40a929b07ace0b20be3003266c60f67bac86ab5ba1a24682ad2
font_02_sfnt_off000174b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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