Malicious PDF — malware analysis report

Static analysis result for SHA-256 3470eeaf5520a44d…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 19:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b403e2db60c1aab84fa5f69e46a6af1 SHA-1: 581694322299839b3827458b80ae737bbe6ed4a5 SHA-256: 3470eeaf5520a44dffe55c69853f97c5e0243cb5821241120ba96625a0b6e24b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=ludo+star+2+hack+mod+apk PDF link annotation
    • http://shoreluxurylimos.com/userfiles/files/40413195559.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/sugafilidepepuretuwedazi.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/36939016805.pdfIn PDF document text
    • http://sinproval.it/userfiles/files/77668331450.pdfIn PDF document text
    • https://ans5680.preneed91.com/upload/files/zamobonugudipoxik.pdfIn PDF document text
    • http://alltechsro.cz/files/zebewaloveduko.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/21574926525.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/41532688153.pdfIn PDF document text
    • http://adacu.org/userfiles/file/20210913213052.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5b548cfcd9cd8f8a0d30b236254f22ab/jibiledadekusi.pdfIn PDF document text
    • http://luxlustry.ru/img/upload/rudurelogejogiwomeb.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161354895c88cc---ravawepa.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/25757102450.pdfIn PDF document text
    • https://siltri.com/fck_upload/file/bawaruwanabu.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67629115564.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/41895d0f5029777d3a3bc729d29d4bb4/85557020343.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/fojejozudidimopul.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/09/18179873117.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/191982793e2e570e2eb938d135deb8ea/62642853543.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-12/20210912023919426520.pdfIn PDF document text
    • https://soechi.net/userfiles/file/wizasajopifuvumez.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16142ba8159b65---nosipavur.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/mowexunakubokijorosite.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_off0000d7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 10676 bytes
SHA-256: 503f4b10f8f3c4faa636e903eda9e57828b77331b7f847d9f8cc1710c77219f0
font_02_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 17568 bytes
SHA-256: de7777f4159fe4445b7786899316f71a1dfd74b5a03d32205dfb987536a621f9