Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2697b8c42d9d9d9…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 03:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed5239cafd688ccd0b70dfac81be6fbc SHA-1: 3795d077f42499dc0c5130b1b52e1c9955b7f891 SHA-256: f2697b8c42d9d9d9d666e3566ea04bb4049c8ff9b8bcc27b8a09d05e32f3e4fb
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classification strongly flagged it as malicious. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://m4klynchburg.org/clients/3/34/34420611de4c9c7593cf5e5fe12de6df/File/jedovize.pdf In PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/60bf8315cb763c29b1622eea8b03c0fe/xanoninap.pdfIn PDF document text
    • https://rotterdampools.com/contents//files/paseduf.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607743a251633---29621462230.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/177f117282da5c3c2494032d2143b752/90240818383.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/popidipo.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4j1fg13css01cbo50con8hr7j5/jekezodijekezagi.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/voxodetonifivilafuvonok.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/92568836914.pdfIn PDF document text
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/32589374944.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a67f42036de---65355320322.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/7705289633.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/66853211723.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/nozoxo.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/jovirozivikorog.pdfIn PDF document text
    • https://dom4m.lv/userfiles/files/poxixerupox.pdfIn PDF document text
    • http://skikk.eu/app/webroot/files/userfiles/files/xerave.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210803_D527D360B6A3FF5E.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/jezisadudixabopakarep.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eea6e9be1f---kegogunotabatajexu.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607894157df40---84657052309.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/755cc4b79b20ba7165d6bcc5da7c1a78/dufawev.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/29878919306.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837ae5809af---34147691667.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aabe635dd8---vawumeravekafetezuvonez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tipografia+bauhaus+pdfPDF 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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 10600 bytes
SHA-256: efbe33f940aab7d767c40606fa28c28f8fde97b7822a3d45609bbf6444db682b
font_02_sfnt_off0001102b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1102B 17380 bytes
SHA-256: 5ac51125150885bcc6518c9a65a87869305d18b93c501e9face30f74d160b43a