Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9b920b1947cfb3…

MALICIOUS

PDF

118.7 KB Created: 2021-06-27 23:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: be90d51726d53461411b70bc88e81bcd SHA-1: cbc13c411b87a329ffc7a4085fdcb369a6932f0b SHA-256: 9e9b920b1947cfb39b1eeedac4022b04497e20b160bd2547244ffc071ff4d94e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://congnghethucpham24h.com/upload/files/24960841002.pdf In PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/72300791126.pdfIn PDF document text
    • http://bettekingproductions.com/clients/874300/File/64398946784.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/wokebolojizulomopigufiseb.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/4a83bfe8d4d947f4bfe8929d11782bfc/36135528296.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0b0e575ff4e763b1197ad173437fa140/65434164479.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd4a6b8552---71550303066.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c966adaa4a3---vowajelejegawexetirasasa.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/57095851250.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/1qhan8750alfrp4b5nfhl5rbt5/xulol.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1bf707e363c6c9c60c0f534840145c88/42828054300.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/jubowijuxazasefunumake.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/nedurugab.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/cccb737d3c1966ed300a7498959fae67/roripitaludibekapineziv.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d45a5625a---saxomexazigibezo.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/613471cb5e16d764411164dfcc6a5456/ragivavanasififo.pdfIn PDF document text
    • https://chezgregoire.fr/userfiles/19798869031.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/tipebo.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/wujozavafameve.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/mnvc3d2034r6on5da8tvlugf4h/63732428907.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/djti9a88fg6ge5tntulrpd0n97/wazowafasanotesudevawix.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/sutekapedilagejepa.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/22718327712.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pokemon+red+and+blue+remakesPDF 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_off00014008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14008 13964 bytes
SHA-256: ae537911add4122007557e61420f78352cc77f41c9ada61414ded9a6c55c29b1
font_01_sfnt_off00016ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA8 18284 bytes
SHA-256: bcf6491d0887feb722b8a534a08f95a03d66122a4532b66b6313ab712cc22a4b
font_02_sfnt_off00019b36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B36 10552 bytes
SHA-256: 087f747619a1be1ddc6d095e69c199d3cd0cb657f452fb52d64c7c24353be092
font_03_sfnt_off0001b339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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