Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb693cd2b2c9897…

MALICIOUS

PDF

66.7 KB Created: 2021-05-29 22:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 10b69b3dcbbbf72f2c6e322497504fc2 SHA-1: ee7ce429a9bf7b7b8d4c83b5cab7873d6a83672b SHA-256: 6fb693cd2b2c9897fa0c84c560a0c1bc853c23ab5ee7e7854e9838f60cc1d129
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://llsindia.in/FCKeditor/file/69394206448.pdf In PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4db2c8cce---ginaripewusepeketogeb.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607184448f99f---dukirefozulobagavib.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961bb1cdfec---98156031803.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d4dda8d59---30374869210.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b801bcd77a05ae58aa84186de6da2a5e/93124870141.pdfIn PDF document text
    • http://edgecs.net/documents/piwubojalunu.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/74356538143.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/66928957719bfa2cd7b2e27c575190ec/jupesotuxiv.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/di5sakt3m9ulm8v9im2cailaia/mogojedikiluk.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/bulebig.pdfIn PDF document text
    • http://growlink.biz/userfiles/file/liruguzigadakukudidor.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/89289474952.pdfIn PDF document text
    • http://sillajen.com/fckeditor/_upload/file/54999509865.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/PmAiG5ZyT-k/uplcv?utm_term=automatisme+cours+et+exercices+corrig%25C3%25A9s+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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC489 5640 bytes
SHA-256: b2bb7f53375371f586db9bf1d73fbfe534616fdee14df2375c1afb50b7e74a26
font_01_sfnt_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 11492 bytes
SHA-256: 16676ffb04edf01c1baa0187d79fb4a68ec224122a4a4e499276a79f7db8df71

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