Malicious PDF — malware analysis report

Static analysis result for SHA-256 465a95078f977005…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 12:00:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 315fc15b400aebb42edf924175a5c34a SHA-1: d1f69cd6b9d61db4d0b452d7cd3d581e1ce0543d SHA-256: 465a95078f97700571e52e9d049cfea7d42aa1c9ed144d08cb023e9037dc3218
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The primary URL points to a site that appears to be involved in SEO manipulation. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest a phishing or malicious redirection attempt, likely leveraging embedded JavaScript for execution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/wix?keyword=advanced+cable+western+channel+lineup
    • https://static.s123-cdn-static.com/uploads/4417806/normal_5fcc16539fad1.pdf
    • https://ribebolavat.weebly.com/uploads/1/3/1/3/131398139/wanepepu.pdf
    • https://static.s123-cdn-static.com/uploads/4459621/normal_5feb76c9e34c8.pdf
    • https://cdn.sqhk.co/wujugojuse/jhlhhBX/12453699336.pdf
    • https://cdn-cms.f-static.net/uploads/4407782/normal_6046702e68261.pdf
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5fd18a98f0e47.pdf
    • https://static.s123-cdn-static.com/uploads/4391620/normal_6005775cf24e9.pdf
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/49dfe7856768d.pdf
    • https://cdn.sqhk.co/fusexabuvej/IggheFM/c_using_alias_template_class.pdf
    • http://rumafelaneli.mygamesonline.org/expired_polaroid_600_film_sx_70.pdf
    • https://static.s123-cdn-static.com/uploads/4369494/normal_5ff6cf1281486.pdf
    • https://cdn-cms.f-static.net/uploads/4379726/normal_60405178a863e.pdf
    • https://sekamaxe.weebly.com/uploads/1/3/4/5/134590712/a82f05a8a5.pdf
    • https://cdn-cms.f-static.net/uploads/4471706/normal_6045ff61e91d9.pdf
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5fed4bc81b02f.pdf
    • http://zugugalepew.mypressonline.com/1605157297.pdf
    • https://gimiduti.weebly.com/uploads/1/3/4/7/134711596/4cc3ae634d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://guriseb.myartsonline.com/mxq_android_tv_box_manual.pdf
    • https://uploads.strikinglycdn.com/files/136761f6-1a65-4f1a-8f17-5be214fc5a0b/43028566423.pdf
    • https://uploads.strikinglycdn.com/files/921c43dc-f82d-4dee-9439-003fd5cbce08/cant_argue_with_that_logic.pdf
    • https://uploads.strikinglycdn.com/files/7f8da23a-a794-4a1e-adb6-ca9a29133d72/tixavowiwofobumum.pdf
    • http://mozutulobiris.onlinewebshop.net/jabenebijezizaxapi.pdf
    • https://uploads.strikinglycdn.com/files/8c0f3978-dd0e-4292-80e9-8d5859344cb3/alka_music_dance_video_download.pdf
    • 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_off0000e67e.bin
a4dfde1fdfe51c05baeba8ac90dc88085609f1c633a84bec4937351de933a1df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE67E 5440 bytes
font_01_sfnt_off0000f909.bin
f006268e2eb25e2ceb28994839d525519521f6bc82760f081a9071a3981625d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 11388 bytes

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