Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af4b8ae20f16a9a…

MALICIOUS

PDF

79.7 KB Created: 2021-09-02 05:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 261615bd199f061958e717a14f240789 SHA-1: e61e5f611c15d507584b2a29f08cb6d315ecc410 SHA-256: 2af4b8ae20f16a9af83c68f5bb5ee4ce7aec32097edaa80df770c9452807c49e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://chcial.ru/uplcv?utm_term=are+canned+green+beans+good+for+you PDF link annotation
    • https://cottonweb.net/userfiles/file/dekugopolibajewele.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/21101248924.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30b10110f6---zezigebevoter.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608769448d7e0---51094188684.pdfIn PDF document text
    • http://decaldankinh.net/upload/files/xuxigokas.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cec08a8ecee972e6bff180838725210d/21762661439.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ee08f153260---genazumatobiwuwame.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16075bee31d065---tejuxilevumatolesi.pdfIn PDF document text
    • http://hzqzg.com/d/files/78258364619.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160911952eed1a---96860967803.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/24801854241.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d771e8a7e9.pdfIn PDF document text
    • https://dananeye.com/uploads//files/202108120229499979.pdfIn PDF document text
    • https://ph789.com/pinhsuan/files/file/dotubosedosunorafimax.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/86208933960.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bd64e65d2---32525027676.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/kabubokemaxifowoj.pdfIn PDF document text
    • http://bvmnotarissen.nl/app/webroot/files/ckeditor_files/files/namekoza.pdfIn PDF document text
    • http://waypl.pl/upload/File/24055513860.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/20b125701dc93d022c150a9faba13a7c/40608059857.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/70211547253.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/43641187336.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a823bea665---pejazagenekenadedoguvose.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/91376899905.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF92 10752 bytes
SHA-256: 93e694c7ddb2faff3b8740852fec390e506ed2fbc3cc51ef0ade1e9e9116833a
font_01_sfnt_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 18872 bytes
SHA-256: 192503b130a0d6abf157d4f2531e06c13313d67f4e3e0bfebfbcf8f6a63d432c