Malicious PDF — malware analysis report

Static analysis result for SHA-256 6309008648010edf…

MALICIOUS

PDF

94.4 KB Created: 2021-09-01 07:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cac6819975ffa1edc6092ac5111d200f SHA-1: d8f90091b7011ed3595f059931409a6772e26195 SHA-256: 6309008648010edf979c90fa0c5d45ad4d9e19805b21533a16ded40adb80217e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary attack pattern involves luring users to these external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://dbexpertise.fr/catalogue_dynamique/file/32281349647.pdf In PDF document text
    • http://emailreceptionist.net/userfiles/file/pemaxefumiwajekufam.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f29096c14f8d81d0f8fb076b80c797a7/vubirevuzigowivefurilizef.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c5cc1b77d52822968ede519c6faa0849/tufupabuzuduliturinisepo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ceeec39cef1---72970660639.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0ahj7grj6hppgki2qv4s5h6e04/befin.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/78d891c784a2467ba3b1dd7961cf527e/mubivojisurebak.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/e02kj9oskau8m0a1qsbntvv7l5/27272687895.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/ragabuzimipuwogimagu.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/xarogafi.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/5khn963s4vtutdl64ua9d4ldr3/19275751202.pdfIn PDF document text
    • http://biomisszio.hu/tmp/figuvedigarixagonin.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d76333d62ba---64989091004.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/daa2300efcbc138ac2216856a06c5483/17143357821.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/kalogomuw.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/2gslrrpok17elm6bpn12igle2n/83242283580.pdfIn PDF document text
    • https://digireg.gr/upload/66989517014.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/42d747b3e5cb13756f9941b948d37e44/36587273938.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/6487308821.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109234f93b37---nulakukajowidisaguj.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/0ff3a1ed58e4157723f7e6b700035a15/48377617344.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160ddcd21943e0---muvugapidugaxiliva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=age+of+consent+in+statesPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 10344 bytes
SHA-256: 9d66fd3ea92dbb50bf94886d7d1ea6002be1d5b795319524b2af8d8fefd3ae8c
font_01_sfnt_off00012258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12258 18664 bytes
SHA-256: 85578fe1fe170f7411cbd99047cf4640615a6e79198bd9c699e0fbc5b1000e68
font_02_sfnt_off000152f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1