Malicious PDF — malware analysis report

Static analysis result for SHA-256 358107d6d47eb071…

MALICIOUS

PDF

169.5 KB Created: 2021-07-02 11:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 20658ede1908391b0ed5ac8a6a08aaac SHA-1: f51277670c64b5438b56ff4c0b2d640fa63cc581 SHA-256: 358107d6d47eb071bc01943d14869747d0cebbc452286d7463fbef249a754ae0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the presence of external links and the nature of the heuristics indicate a potential for malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8964

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 https://oniceh.ru/uplcv?utm_term=fairy+tail+2014+episode+list PDF link annotation
    • http://qytbearing.com/upfile/file/65498224538.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210629_E21B4A8F9060E1CF.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc1f17e4d7---84640069016.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/67855266111.pdfIn PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/96392903700.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/1mr9pl2fkmu4ij5hnam4cej5o7/neletezugubeze.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/7532898731.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160a7de6279270---dutupibipupenupemu.pdfIn PDF document text
    • http://artin-intranet.com/ckupload/files/bekezuxitaxom.pdfIn PDF document text
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/rugikutisirilogas.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094899dbc7df---pajejajodepimofavasunip.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/b0553b906ae509825d94cf5175989dc8/36149510637.pdfIn PDF document text
    • https://avenue102.com/uploads/file/32270322868.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f7e883183516f255f86fdf34f75ee3aa/relejuwujojibun.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76a1cca5a---votobimugiko.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074527517621---gobotixo.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba66eab4f99---43415436466.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072233db525c---mozolizafejesisetikibu.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/82873a22073acd6ed450d89aecacf570/22327266090.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098207e5acb2---5370165610.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160947859f0eee---51312036598.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081b11f383b9---xurujisudojekofe.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b50fddb2c5a---xozuxuzovasimuzopesa.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ceb7f82e2848ec80e2f04c00c278ca85/bisoxi.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFF 18828 bytes
SHA-256: 5bca14402c774304e198002ace0948b7b78bb40ff2e1598bd16c389916c94419
font_01_sfnt_off00017e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19650 10744 bytes
SHA-256: 7eb303d52c0b7d4c77955973e96e76ddd9b7603fa9311ac62d5b83b09b9875e3
font_03_sfnt_off0001af37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF37 79972 bytes
SHA-256: a5dbf3b993838adf57cf3e099cf3e5f17342a1bf98606c60d107d946036da677
font_04_sfnt_off00028279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28279 16132 bytes
SHA-256: eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8

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