Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad066b2328a431e…

MALICIOUS

PDF

74.3 KB Created: 2021-03-21 05:25:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34752773b61d06a216772de3a4e4d715 SHA-1: eb0b3e915638c54cafd5de622c92a6a6c3289f8a SHA-256: 7ad066b2328a431eaec4e54b2b49d9fadbe608ed7e610ae7a90cfe2c0a0285a1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm designed to direct users to potentially malicious websites, such as the one found at 'ponafet.ru'. The document body, though heavily obfuscated, appears to be a lure related to 'Maytag dryer troubleshooting', a common tactic for phishing or malware delivery.

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-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://ponafet.ru/strik?utm_term=maytag+dryer+quiet+series+100+troubleshooting
    • https://cdn-cms.f-static.net/uploads/4416927/normal_602b7cb57f296.pdf
    • http://dakajak.medianewsonline.com/30665945693.pdf
    • https://cdn-cms.f-static.net/uploads/4504641/normal_602a0fc62952a.pdf
    • https://cdn-cms.f-static.net/uploads/4470683/normal_6026430723d0d.pdf
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/44f7bc75bc7fbd.pdf
    • https://cdn.sqhk.co/kigimole/hghgrVR/counted_cross_stitch_stars.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_60443d59b1c4b.pdf
    • https://cdn.sqhk.co/paxajirawegu/hdYYbjc/my_myanmar_unicode_font.pdf
    • https://cdn.sqhk.co/feguzuvubut/jghzFuI/muzarawozivibumubavilariw.pdf
    • https://xizonadap.weebly.com/uploads/1/3/5/3/135326441/9053904.pdf
    • http://jusukigib.sportsontheweb.net/shimano_ultegra_di2_r8050_gs_vs_shimano_ultegra_r8000_sgs.pdf
    • https://cdn-cms.f-static.net/uploads/4412575/normal_6021eabebfbc4.pdf
    • http://gekifek.scienceontheweb.net/what_is_a_functional_analysis_in_engineering.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://65fca3b3-7ce8-4d56-9bc8-ebe46cc5223b.filesusr.com/ugd/f6ed72_97cd3fc86d5249ec86e6576bf0d87da5.pdf?index=true
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_e20eac2dd3804e238f0909e7e2cbd1f6.pdf?index=true
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_13af0a102f2346d090503f29cd05ffe3.pdf?index=true
    • https://b2b554f5-9fa3-41dc-a0fb-b7b4c1a7cb97.filesusr.com/ugd/0bcf16_016b90e9c8a141f5b885ede201c6478c.pdf?index=true
    • https://332892e0-6a2b-40ad-946e-e7c92c61c867.filesusr.com/ugd/3e5d97_d65444490bed4683a18028e644b49fb7.pdf?index=true
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_f40bdd8f73f14e00a376665d6f276402.pdf?index=true
    • http://gosaduzunake.myartsonline.com/caracteristicas_del_apriorismo.pdf
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_5dd4e05e56e04373b9abfcdbe33bf037.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_32311fc5f4a044b48037be7660454a0b.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_off0000e4b3.bin
277f92eae887b48c2f499fd8ec9ddb3d344011bcfb9acc134215d52810705d35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 5656 bytes
font_01_sfnt_off0000f7ed.bin
c6a3c3b0765eb6b5842ee2d7321dcd7c231573b04f3b6b43f326e0845fab5dab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 10476 bytes

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