Malicious PDF — malware analysis report

Static analysis result for SHA-256 64797fd151a5daa1…

MALICIOUS

PDF

87.3 KB Created: 2021-06-10 10:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 08238f88328e61051ffdf8eeaf72b020 SHA-1: 85302f3464faba0eb7f79e97f23c3780021f0ceb SHA-256: 64797fd151a5daa1dffb35e969ce261b77d50f42a07f1446be2528e735da228b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata related to PDF generation and a search term, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://queure.ru/uplcv?utm_term=planning+and+scheduling+of+high+rise+building+ppt PDF link annotation
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/2jccgl14lk8fkhjj40ni8ftcct/74041807634.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/6hogkjunieo5206699bjipor20/pobigububavok.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/jenegom.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160848135948b2---6138657317.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb3400152---xozumakapojot.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607124399a7e6---70776348656.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/d8fc1e3dee1ddeaf6915ab5ade49fc1c/vonowibakefuw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072b19a3a8d0---zaminizeko.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/getuxuxofawuwina.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/bupemusejukonoduzagemuz.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/35462844980.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/50f6e539add3ae825996b10999199048/riwolubimatax.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/52711186281.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/82fn7661jgofooh0v9viuqvok4/89544658897.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081c628a1ff3---pinomopozuwejaxo.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083d58bbff3c---85054164870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F08 5556 bytes
SHA-256: 6ca23dc28dd487fc49fe890db4366af07a3acd2457317a5f7b3796d259981ce0
font_01_sfnt_off000131e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E8 10940 bytes
SHA-256: 68bece591ec3e47a9cb8d35d73a9d1adc76dd1022519bfd5b72d5fcd3f95d6e5

Open this report in the interactive analyzer, or submit your own file for analysis.