Malicious PDF — malware analysis report

Static analysis result for SHA-256 362e29621504c430…

MALICIOUS

PDF

99.5 KB Created: 2021-07-08 04:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 715c0c57318a48a5945547a704fa40af SHA-1: 78f909f58ef7ea2007f99cb64207b8f810d3411d SHA-256: 362e29621504c430f590f737a4315b7de1d7a55249602ea9eb626d3f9b4708a0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://yds-wcv.jp/free_images/files/1075975036.pdf In PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/7e5ab855677977c14f96628c166d1c43/vojinuzofosik.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wamixinelubewiwativamuw.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e1cf841ba603ca6a8aad4094107fb29b/39301328168.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb65b8f07f---mewajer.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/49638597930.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/bes0pcpul76d0nlgbng2e58896/76174544868.pdfIn PDF document text
    • https://cafesca.com/ckfinder/userfiles/files/79344034187.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/2f62405a2a775390bf4b08ea44ecd886/noxegu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f49b8b63e---bibonelimirexaxelo.pdfIn PDF document text
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/vizutovole.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ktsnldbj5ecn9f717gcsnr1nd0/383950397.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/00d84f8e9caba1ce3e7885daa8fa817d/dujakuxokamirumop.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/5f0dbec5854e71f02fab43a5455ff590/22822147202.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/56673492054.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/db82ba77a253102a1240496859829609/34077926571.pdfIn PDF document text
    • http://rydelko.pl/userfiles/file/xiwexulubamidew.pdfIn PDF document text
    • http://gotween.com/userfiles/file///1731206823.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9cugph3g6bjqu8ajo2g1esq982/16514041756.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0cb609181---sedawamapolelozexoge.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95aa73bce3---28287641624.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/b80f025c3a2f203e1947583f15005ec8/beneriwusajeral.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=the+higher+the+amplitudePDF 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

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_off0001223b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223B 10508 bytes
SHA-256: 3df59a5773df079073be0b8bb8ba9177994a5cc803d78c968644175d6a92db08
font_01_sfnt_off000139de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DE 18176 bytes
SHA-256: 3e5f3f815a2f55a1f6e7adc7b3be9b341db94b2251e09fd2b16dee00f5b53ae1
font_02_sfnt_off000168dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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