Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a9193261007aa4…

MALICIOUS

PDF

62.5 KB Created: 2021-06-23 10:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 330bef07a7938fc0e9ccb7dfbf0973fe SHA-1: c447603d12a1283bb487d2405df04531fa45bff4 SHA-256: 24a9193261007aa46643f7e30d7e3b9980d97c78d23d934fb90c5662f54bd896
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing trojan. It contains a link farm directing to numerous compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. The presence of multiple external URIs and a link farm on disposable hosting supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://farmaciafoglia.eu/userfiles/files/jejavumesudimepopexix.pdf In PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/25278b5c0e81517cd7fc1cc257f99698/keriwugetibometujuxobe.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/jawikumotabizu.pdfIn PDF document text
    • https://masini-de-ambalat.ro/images/userfiles/fezejolakomu.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/dbdf77d9027099951c50d05e701bb8fb/44012331072.pdfIn PDF document text
    • http://atek-ent.com/upload/file/95010370316.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/gr572bbgjrpg65ibpru5nqo7ic/94792392829.pdfIn PDF document text
    • http://healthywithhart.com/res/file/18338748932.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/86b93c677635c95464e0da26e07c13de/vejebe.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ee3142965---47328042330.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6ceb42d1f11cd9b6c157b28f30b62e58/99775629402.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/1b4152f0a47b34e6174a6f9b15ec368e/fadiwurakabopolanaru.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/gujudi.pdfIn PDF document text
    • http://www.infos-lentilles-de-contact.com/images-sites/files/89348791713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=downloadable+dictionary+pdfPDF 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81B 5304 bytes
SHA-256: 86e0fc592aff71b2808ca7aa0ec60283e424a0cfb1ab2f180d3da61878ca9c00
font_01_sfnt_off0000ca53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 10328 bytes
SHA-256: ef13b577922980641fc2ca482f0c8a69f388d612b26a5d863c9a6747815fc3ec

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