Malicious PDF — malware analysis report

Static analysis result for SHA-256 3350c0282cdeb3f4…

MALICIOUS

PDF

89.2 KB Created: 2021-07-03 19:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b347cc82354ea4fab1fc6e22eaec11b1 SHA-1: cf4f7630943deb03652a7e68ac8b9612bea90b7a SHA-256: 3350c0282cdeb3f4a8a550a4c876a424f812e05f4ee2edd688fad19013fc7e90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://allytemp.ru/uplcv?utm_term=vermouth+on+the+rocks PDF link annotation
    • https://anpheatingandac.com/nbloom/fckuploads/file/59497790431.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8fe296791---wijavajujowo.pdfIn PDF document text
    • http://togetherwewalkny.org/clients/2/24/2411cc079aa0f0d7fd57f81c6163ecfd/File/51781961043.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/a44e71738d1316fde6296f4415a3f341/kevar.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/57328889708.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/2b55ea921797e30063b799a7dd79daee/josoji.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/9dd71c4def326bfab86222f7b5aee2a7/12682309148.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/7qsj43m1doabuvasr8u2sp6r48/34106323642.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/88433983953.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/jusadubowenita.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/49066682608.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/94678717940.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/pogenupogivorep.pdfIn PDF document text
    • https://sbufficio.it/file/40739183917.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/tokapolegige.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/34409679838.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/bsdsatkenuiemp666ghd05rjrd/mivoxesoxijetitapawu.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d77965d28a4---bekovizuneke.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160dad5f716128---duxuxoxonuleg.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6f865c76586c33fc4e05ec6c3cabed0c/vegesolawonuwadixawabun.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/dc740eb51758a5c394e7d5a3604e7f59/87354663862.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a0dafbf2---jipoja.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_off0000f803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF803 10356 bytes
SHA-256: bdba7cc6275943f2dc9e4b0bcc5d87a8360809faeb6be3da725b3211db38442d
font_01_sfnt_off00010f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4B 18176 bytes
SHA-256: 83a5de31b75c9b707b6b87d0c253d13175783f9e08216bbe3d7dd99b430e58ba
font_02_sfnt_off00013e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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