Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34ca33fd519f884…

MALICIOUS

PDF

80.0 KB Created: 2021-07-02 03:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 82d406761d76b4d72b9c51949ced2f88 SHA-1: 8f92247b036ecccce62aa6469acbc327c890869b SHA-256: a34ca33fd519f88452da3c39c41b8df17bec16bc77aa2e76de6bff20d0e970fc
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites or disposable domains. This structure is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://amandatravel.com/userfiles/file/xozuziwid.pdf In PDF document text
    • https://tortugafilms.ca/adminfiles/file/145132672.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/mazezemukeraluluvinawukum.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/3657b81345f3b2fd393c4a60b447f5d9/dimamozixadiziraxe.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/73191611592.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b0a963541ebb4f478b7cf819377c226d/46196607516.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/puwigonogebimexedufekow.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d95584203e---61533245493.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c66aae9913---92481429994.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/putoporakubalitefit.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/8097047e0e2144a9472470e0708db666/guxafezujunomu.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/38781156482.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7edd3c011---vasojubilimabobagu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/28ceb22e282d67d319d4780b96263c69/dunavibowodomo.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1832fdb161b4be61a430033ba3bd664b/21115635767.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/96182829857.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/8013cb3b9af4952e2c7816ed008186c1/febimimaluvefusi.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d0978ad0---bedifap.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/7818475277.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898bfc3efc5---suvijojabavapudutir.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/40895889281.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/dc0443e45b2ef1cf7cc72e34b04072f1/tabozirajesikavasaro.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/9aa30d22790f2798d9ab2a196eff981d/37978818214.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/56126216831.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e5c50be42---53428639499.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/u3nla2nrtmml6segvhq3nqbgoa/15720015763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=john+barry+somewhere+in+timePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B4 18988 bytes
SHA-256: edce16d8c8ba1a619d1b78afd9a44f3903c24537329f461fef9913464da31bf5
font_02_sfnt_off0001189f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189F 10660 bytes
SHA-256: bb3a79545cceb03b7e71faf7e5021615a3843aa5b0bd1a3ebbf752395910fddf