Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0d7f4ffddf6426…

MALICIOUS

PDF

89.6 KB Created: 2021-08-02 14:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 08e7e14ca04729327d1dc51d16a589bc SHA-1: 8bcfb52a0c58f0cec18a9f58f3a0b2574685b6bd SHA-256: fd0d7f4ffddf6426828ede42dc692a7a7064c88afe951513b33df35ffcdf0348
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://huntic.ru/uplcv?utm_term=how+to+make+chocolate+cake+recipe+step+by+step PDF link annotation
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/t6kqllqg87ciiuv70920tqlh60/figedivutibogunizane.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/d54vd1ck4imj9gi5er4irp57l9/goseweguseragef.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/f8us170l5s7k3th935rcfpak19/vexumasavonudadagiwalosat.pdfIn PDF document text
    • https://angkalaris.com/contents//files/79324619752.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bfba5b24fb9---xefegikezijenodun.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/safadixa.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/10439473200.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/93379242611.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/oo2for3j6pibci5qa6aihob442/rovolupidavukufa.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/76545472552.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/94c1184956b8c462731ae56c1fb2caab/natoribeko.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/39448270872.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/17161567423.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/419e83c107d9c0ed6a810695c4c0c767/27265685284.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ff01059f8935c6f682cf72be2b61b959/26302466128.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/68213391838.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098de2cb8e7c---jefegabo.pdfIn PDF document text
    • https://sankohomestay.com/userfiles/files/pajusom.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef8b33a21---gupirusatavepa.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3df164590fcc2302d9b19eb2d45df606/budawimukigebizut.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_off0000f942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF942 17496 bytes
SHA-256: 6e346823c7b2e249c80d29368129fc782c3e3523b5b18251267c443f49142621
font_01_sfnt_off000126fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F11 10956 bytes
SHA-256: 3a5be4dbd1ca8a05d641fd189ddda4921c6f3a2b683ed3f22bfb917120b8c425

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