Malicious PDF — malware analysis report

Static analysis result for SHA-256 60349fba302776dc…

MALICIOUS

PDF

75.6 KB Created: 2021-03-20 19:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9475a0fde66623890c5b480a374cd13 SHA-1: 7f3d0770b4bfd6ff0fef8f2f47750f5b33e82df9 SHA-256: 60349fba302776dcdc74777624055bfcf979ac4f0e0642d976c44bd23e9ca234
156 Risk Score

Malware Insights

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

This PDF contains numerous external links, with a significant number pointing to potentially malicious or SEO-spam related domains. The PDF_SEO_LINK_FARM heuristic indicates a large number of generated links, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=workshop+technology+welding+pdf
    • http://lotto-investclub.com/2138352464lku8m.pdf
    • http://juilopkiretlo.ru/jovolasimolujiwemixuqmgi9.pdf
    • http://tomolijoponix.mypressonline.com/axial_skeletal_system.pdf
    • http://micrometerdigital.xyz/liramecs8ll.pdf
    • http://suvonenexazu.mywebcommunity.org/43062300314.pdf
    • http://ziwusis.getenjoyment.net/funcion_de_los_alveolos.pdf
    • http://linavaluviriv.getenjoyment.net/5887792997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bupaxomu/premabhishekam_songs_audio.pdf
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_5063514552ec448a8d147e77899a738b.pdf?index=true
    • https://s3.amazonaws.com/muvemasoxaji/56054704959.pdf
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_6350ae75910a4d409f4cf790a14c7345.pdf?index=true
    • http://bujekotu.atwebpages.com/somusinedosizumitekovawo.pdf
    • https://s3.amazonaws.com/zupenafud/4_inch_binder_label_template.pdf
    • https://s3.amazonaws.com/dojivewobasuval/modified_barthel_index_scoring_guidelines.pdf
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_f12487aee62c42f89f3cf15b42657116.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_800fd6b1a5e243e9a9c92a28d6cb6464.pdf?index=true
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_bba674ab953d4da5b97680df45592374.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c7.bin
c179ab3b2ca7ec7974c046f1c8242d2208af6bd9a38c59b289d1b7a7a4cbe85b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 5480 bytes
font_01_sfnt_off0000fc8e.bin
9210e74437229825799f71430c4e7b5acd530a606aa68f461873dbeb7c0c8714		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8E 10752 bytes

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