Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0254e25eba95ce…

MALICIOUS

PDF

71.6 KB Created: 2021-05-31 01:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46287ae6038467622c0f6acabc3aa1b0 SHA-1: 1ca8dbde37c8373aeffd266d1a8f654c6bf4d870 SHA-256: 1f0254e25eba95ce631258d45d1aff41032a0674a059940ac662d3c7839661db
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm used for distributing malicious content or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure, likely leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8179

Heuristics 5

  • 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
  • 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://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608405ebdf74b---fegerog.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/9c5acc8f125e38f6770bde329a6e208a/wabadulinejikepibov.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090e1e2a8549---xadebibun.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607710ea7e21e---92984322340.pdf
    • http://classicalgardenornaments.com/uplds/file/68696651832.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/45906827477.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a88765731---97039554944.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606feef930008---72119191735.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b55525eed4---jovenaxazowi.pdf
    • http://10glazsikeyrosa.ru/file/momasogorajigo.pdf
    • https://myphi.biz/nbloom/fckuploads/file/23459792910.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/u4856rc483uv4eb1g746a5tpg3/zinekoxamaterajubi.pdf
    • https://alihuata.com/userfiles/file/sigajaxufemimeg.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4def3e68f---leporobuniwaku.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-14/20210514075523784764.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=o+emocional+inteligente+pdf+gratis
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a38.bin
9f8cc16349964d4823d7aa9d2e73af764a74066e6e91fcebb29cecd20b32bd49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 5504 bytes

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