Malicious PDF — malware analysis report

Static analysis result for SHA-256 d205d7e48a43ae2f…

MALICIOUS

PDF

111.6 KB Created: 2021-07-03 04:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e79ef06dba9385c673232efc6c5f0914 SHA-1: 0d01f0a942191d5dac1c6b5e0d1dfd94e0e9cb72 SHA-256: d205d7e48a43ae2ff31684f3e5e03b5b6f9b9ec746c02a1288ebe2f79e76dd0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress installations used for hosting malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially compromised, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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://pistant.ru/uplcv?utm_term=demigod+meaning+in+english PDF link annotation
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec4e7ba46---34541804842.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5bf4cdbed57619dc6b0f38371bc3ddde/kexanegi.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/f1560a258c91b4a0bd9bc79b765f4389/juworoja.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c69844eed43---61183597282.pdfIn PDF document text
    • http://nineslash.com/user_file/file/10091257233.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc6cad15d---88551679898.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/xaradaronewenanukikobuw.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf62cb7e9---lemokaponanotegawavekum.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6c5073933---86324423910.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16070bdd1ca882---dabovovibilaruw.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/da947ff02b096e93e4be8344eb2ba1b0/59870950320.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55883356d1---felapafogena.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160748142200c4---wovosebovamenewerixeki.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/u854n5tblrggano20f512i09dr/tawotuzoze.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/29798499725.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/85058b3b0a6fd377f5b19d0d901ebe7b/tagazutuvisujazotirizi.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c64fe84e718---97444496704.pdfIn PDF document text
    • http://email-database.info/userfiles/file/xelipika.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c50d2f8e723---89339357489.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/pajif.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/84944349269.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/39845571945.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/rodebitaxoxedidenowufol.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/laletukiwomimulosawevaj.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_off0000d55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55D 20580 bytes
SHA-256: 2ea4eaec6d18471c892a1183f74a0dae06a81eecaaba57a9dcbd329a2efcfb40
font_01_sfnt_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 16848 bytes
SHA-256: 0b19b47bd9ed87acf1bd92019ac74a8461239d42cc9919d2b44f48efd8daac36
font_03_sfnt_off000139bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BD 10500 bytes
SHA-256: 02649931f60cc56a24ee2db5fe9ad54d9a96e161d6ae0828829b766d492b40a4
font_04_sfnt_off00015119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15119 33356 bytes
SHA-256: aa6e214067edd41e27816a3db291f3de80b850631da2199fc67144db1e88357f

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