Malicious PDF — malware analysis report

Static analysis result for SHA-256 2076053ae6629973…

MALICIOUS

PDF

211.8 KB Created: 2021-06-28 06:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 25ed39dc48cdfb4354587d44249f40c2 SHA-1: a9bb3eeb3cd769ed5b02502f7e4e8dc855f44269 SHA-256: 2076053ae66299736fbc8d1be41b5ddbd8a607957f0228bb7dc6dbd4e5d92df1
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a link farm pointing to compromised WordPress upload storage, likely for phishing or scam purposes. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of numerous unknown URLs, some hosted on compromised sites, indicates the document's primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://danielbushreunion.com/clients/41596/File/sekod.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f4f7ca4db606324a56897ffb54ca4c3f/49607526439.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/zodirowokuragutudetikexax.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/gukazedati.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/96d399b6b155ff55c49f64aa45cc5da2/39810830563.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/degosovefoku.pdfIn PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/konomovonedaj.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078d3f7c8c22---65598926073.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e975d16941---84101539893.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/c1tr3u1u2ooj1oosbc7fbfkpq6/58383183240.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/20912716692.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/4897bd2ccd06170cb119a70b2227d2c8/50162228473.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/6mrg8s119irig0hgrlb4g5l212/dixujolosanoxawonukugumu.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/579dd18f866de19feeb26dd4f52d7b7a/16607539881.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/57f11c7511cf884192482b906f4198bd/lilemogupemigamijis.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/t6pdii5crpdccplha1ui1c3u5l/gekixikun.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87a54ea79f---19339475428.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/47574862987.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rgp6a8dd73a6hhbi1q728j11c4/zatonujulemegog.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089ad24ae49d---60961006141.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/d92dda33e797f4ffce00fe424c1b282c/34841554081.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/8mfg7jiuci68dkj7enleou8ug5/2012910414.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/24318249435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=what+relation+is+my+grandmother%27s+sister+to+mePDF 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_off0002c09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C09F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8AC 6404 bytes
SHA-256: 6ec159365c59c561c3c4403471c3533bcd2af8c0744e48f0948d755cf37e2173
font_02_sfnt_off0002eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EECE 10836 bytes
SHA-256: fa7b24838b90dcf8fe6e6dd19f4813531348f9b990abfe067f615e5bd70b6a53
font_03_sfnt_off0003077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3077C 23976 bytes
SHA-256: f825fc7ad7b28de4e86e1692fb8429f7ce0683b57fe0334943ac3fba9739d49a

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