Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd0de83536a01bf…

MALICIOUS

PDF

86.1 KB Created: 2021-09-02 04:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b5bf01b7ada2e62cc7fe921a70b0affa SHA-1: 1dd428d0bc38b9c656855217687fc729829a19ee SHA-256: 3cd0de83536a01bff0826721e4c9dc7853bb4aa63ec4aae2de6a6e8320b55480
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/0hsfglhrc7aqvkupjq11gd8a00/derokujujilowaxuruga.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8e7debcab---4722080912.pdfPDF link annotation
    • https://fullgame.hu/uploads/files/sumonek.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/tapalunubivadoveruvageg.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/liluxalomodurilapog.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/ecbb08129479c33cfc3ec1bfaf3dbfdf/62406989143.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1610719ab69335---63219323697.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/96084213301.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd76118b85c---12757283188.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/offe8k1b7h7acan5mp7feghlcg/gejelikegarofukodagimofer.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/16302384990.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1629416206.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/46580691997.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/narumefik.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b5dfca7a2bcf998c6a1992b915016c1d/tutalapasovevewu.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/newibirupikorebabasazina.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7dfda606---54729868964.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3889a3d70---48406538928.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/sanunusekefuz.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/8287781127.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/kazapinuja.pdfIn PDF document text
    • http://skncn.com/u/files/gajam.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/xopulok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=did+isaac+pay+tithe+in+the+biblePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78D 21744 bytes
SHA-256: fa958912e7dc0bd9bbbfa98e53405821e71e3b4d41c6484962336c75bbaae4f9
font_01_sfnt_off00011122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11122 10648 bytes
SHA-256: 6daa6a258286868a4efa1dfc8d8f72da145594e279aa2ba1a8fbb98fb910b834
font_02_sfnt_off00012949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14156 1872 bytes
SHA-256: 79be395588af96fa5df472893822587051e439780fb3f760348c77be68f22830