Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d29e29d77811fe…

MALICIOUS

PDF

78.0 KB Created: 2021-03-15 20:31:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1603b78fdc5fb22535a8221998efdcd8 SHA-1: e087ee766b41e73f8dee549c0b4b9f488d9c5e09 SHA-256: 97d29e29d77811fe83a1f630beea8a34f36f4dcdb460ed687fb6715b5d54df53
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are suspicious and point to potentially malicious domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or delivering a secondary payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=partai+politik+di+amerika+serikat+pdf
    • https://cdn.sqhk.co/midipijikami/TwjgjGy/fuvabodutemaki.pdf
    • http://segway-wheelchair.ru/8295727795qaf3w.pdf
    • https://tumugisoluxadez.weebly.com/uploads/1/3/4/6/134601474/ea0f62961eb1e.pdf
    • http://tlgfree.xyz/how_to_remove_insinkerator_power_corduyc8f.pdf
    • http://salestore.pro/13221654375f6irj.pdf
    • http://formblckr1.xyz/35097023840cke4j.pdf
    • http://keepxufi.space/rejulirojomifukebu8hu2u.pdf
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/fa23875.pdf
    • https://bolefusugo.weebly.com/uploads/1/3/4/8/134868203/2065946.pdf
    • https://cdn.sqhk.co/muligumixe/giig9jf/gujurixupumepuvisozenofav.pdf
    • https://rizipotekam.weebly.com/uploads/1/3/4/6/134639676/216157.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_6e4ec7b2a0ee451db8e3807a6d276ef6.pdf?index=true
    • https://35479656-6a94-44d6-ac55-da507c14a2ae.filesusr.com/ugd/d68318_4cfb9427286a4ec0a8b884b16ef6a338.pdf?index=true
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_18406389a5ca4c37932c43efe1b5c344.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ac4ba6e0-35d1-46c7-93eb-4460949e1afe/bluest_eye_summary_and_analysis.pdf
    • https://s3.amazonaws.com/tuxenipup/1960_evinrude_18hp_fastwin_parts.pdf
    • https://s3.amazonaws.com/lopadivupudexa/nigoxoga.pdf
    • https://uploads.strikinglycdn.com/files/6a23f590-b4df-431a-a790-c2d91ab74f47/zurapikozasepapokexo.pdf
    • https://s3.amazonaws.com/nodetuxapabara/dopimimizi.pdf
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_f8ac2d9077fc4eddae7dbdad5d0211f1.pdf?index=true
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_91ab4243546948d292bf2e65f72c8330.pdf?index=true
    • https://uploads.strikinglycdn.com/files/de0ccc14-81d1-4265-94bb-8ac1f12da172/biology_the_dynamics_of_life_textbook.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_off0000f3c1.bin
2be901646a7a9db742edf3ecf72c1ae36394a839007b4fd58385536933588338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C1 5252 bytes
font_01_sfnt_off0001058b.bin
e6377d828e57c80b35a072793c2f1672e5d174150d88402010266ec8458f4390		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1058B 10376 bytes

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