Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08f452de432c2c9…

MALICIOUS

PDF

78.2 KB Created: 2021-09-06 21:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f4660450b06899d4ca43eb447abccbdc SHA-1: fbd30fbeb8a30d2e5e86b7c181c6ef03df3bf8a1 SHA-256: d08f452de432c2c973ea68516140b1f61995c13c121664c0ae3b84e053a8ea1c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous PDF files hosted on compromised CMS uploads, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary attack pattern involves leveraging compromised websites to host and distribute further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zs-oilfieldequip.ru/d/files/gelegabafijomiwovik.pdf In PDF document text
    • https://mamotato.ro/userfiles/file/77956856439.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/87770699169.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/xigojagox.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/os012q9v39ogul4h9ejiqkseag/65070617528.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/newavibeparevuboma.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/675afd29d0bc08f32bf32310664cb67a/89604336379.pdfIn PDF document text
    • http://bakoca.hu/files/file/62757479007.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704fdf91442---zofonuxa.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b36f2db8cfc---65222446945.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/lozetedurunef.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/kujilojuvaratoxob.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f35e93de6a5c724c3216e8aa2ad2dcf4/40764760447.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/95835961640.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1ec469ba59fc7e9b7ae31f591a16cd00/wifaw.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/mavebomugeruludakonemado.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c37289352---kugowavoxumi.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/53438532931.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/89700332133.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/f036f4b2dc7c40f58087ca26527b7360/25574818894.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=mappa+di+pescara+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://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_off0000cc6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC6D 18520 bytes
SHA-256: 8f8e4ba02f51c9907e22b3275b308eaadbcb718f4dccadd2ed4eea2ba506dbfe
font_01_sfnt_off0000fcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F2 10240 bytes
SHA-256: 5265129123a25f7ef7f571e8bbbc69f800097b454b0c9850e18a122db5ab81d5