Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b1c896a092f89d…

MALICIOUS

PDF

82.9 KB Created: 2021-07-01 10:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 45aa72abd6228a8d0d859ab72290d5ff SHA-1: f8707d8b87c6bca8ca1b2b1ead0fa7a9904edb39 SHA-256: 30b1c896a092f89d83e566523e727f35e1550d6333e0d1067dda2ecd88e473eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://infrive.ru/uplcv?utm_term=going+to+probate PDF link annotation
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/4b1836a46b2122f65ed79152f3925ed2/buxogezojenakexoronama.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/ziwese.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0ff35e93---rezozarilomatataku.pdfIn PDF document text
    • http://esistore.de/userfiles/file/fizugofiti.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b558e7c31---dumedesunasexetuli.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/17464f4ce8c9b8cc1ad204baa0de8281/lowagezirerilelexigiteg.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6b66772ff02532a939be5306c739d2fd/65281149757.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/72112787705.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/lalikepikomusemepuratone.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/79349014736.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a717e717c---34994314145.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2d44495d5d60e452e94c8dbd31b3ad58/76089899338.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/1455938908.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/75bfe611fd770a8f3491c2aa6de939fd/41265903534.pdfIn PDF document text
    • http://turnyras.lt/Files/file/vawogavanojawotimereb.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/c5ff7fbc7f9e43a18602f7bf27eb0fa9/4731056129.pdfIn PDF document text
    • http://adveotec.com/img/file/vuduregijaterabigi.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1e9737734---wagademofafore.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/kofupu.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/8cb4039d61ba70778c2f809662c5b4c3/21484315352.pdfIn PDF document text
    • http://islandpointfl.com/userimages/35192704415.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 17160 bytes
SHA-256: 5e0471c836b5c97633c67b473bc95f7c9855a186407d594578907d073c6085bb
font_01_sfnt_off00010f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 10392 bytes
SHA-256: 9af33ad997206df314fae018ce6e145abd11f03476a8959457065ae6ca050510

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