Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d92175fcf46b71…

MALICIOUS

PDF

77.2 KB Created: 2021-05-17 14:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 024e341fcd3f93f5dc5e9f689743d9b7 SHA-1: 518162addaa6d0219686bebf2345eedafff19e12 SHA-256: 29d92175fcf46b71bfb9c9d2dd8edfc41e0958e844081ccc3d2eef47c90e0761
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://xajibur.ru/strik?utm_term=a+mother%2527s+reckoning+quotes PDF link annotation
    • https://bodokevusigow.weebly.com/uploads/1/3/2/7/132740435/4310923.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/mewamuzilid.pdfIn PDF document text
    • https://joxezikawatunex.weebly.com/uploads/1/3/4/6/134699300/pamagimavisi.pdfIn PDF document text
    • https://tusopapa.weebly.com/uploads/1/3/2/7/132712380/gazuvipumowoxetal.pdfIn PDF document text
    • http://reduslim-sito.site/alpha_male_word_meaning9emvf.pdfIn PDF document text
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/5fdbe487cd7.pdfIn PDF document text
    • https://bomekabekoz.weebly.com/uploads/1/3/4/8/134863976/5363651.pdfIn PDF document text
    • http://wekeb.space/counter_strike_indir_gezginler_1.8vchng.pdfIn PDF document text
    • https://wimupajano.weebly.com/uploads/1/3/4/6/134682998/powowi.pdfIn PDF document text
    • http://filmera.ru/thinking_maps_templates_freel49zw.pdfIn PDF document text
    • http://rewita.fun/baby_carriage_3d_model_freedu3ao.pdfIn PDF document text
    • https://neriborotarisim.weebly.com/uploads/1/3/4/3/134345051/torol-vofaxezun.pdfIn PDF document text
    • https://romidemifavev.weebly.com/uploads/1/3/1/8/131857114/98b200ed3743f3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6674166f-eb58-46b1-9d38-a528bc95e02c.filesusr.com/ugd/e38d8e_0f2b1721e397426b91596cf019ee2bd3.pdf?index=trueIn PDF document text
    • https://f0ded7c6-1882-44c2-b580-3fd8daacf182.filesusr.com/ugd/1cd4ca_17aa7d9716784414a0ebd5096b7334ff.pdf?index=trueIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_b958f8acc19c467b9b8b5f85526819f8.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_337d63ec9db94fb09258eeb51da6737d.pdf?index=trueIn PDF document text
    • https://b1c30c75-ab46-439a-884d-3836ae4b8a49.filesusr.com/ugd/2d1648_6d51afb393724eeab8267975d1f14492.pdf?index=trueIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_db6a825e0f0447619cc6e0b27cd08c6f.pdf?index=trueIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_da21215160a044509852c55df5cd43df.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_2c8c8559db254e45b1ae9069876472ba.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_097fc8ce47374b6b8a55f8e3d107946b.pdf?index=trueIn PDF document text
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_d02721957e34420da6d2e16126616fcb.pdf?index=trueIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_81568654a7fa4668aa4e68447cb7bfb6.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_45c8922417a4408e8370366d5676a15d.pdf?index=trueIn PDF document text
    • 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_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 5184 bytes
SHA-256: c752f7c71d3695eab0101c201fbca662d45c1d648aec45aa17fc4a07d51b0964
font_01_sfnt_off000102a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A1 10708 bytes
SHA-256: 79e97a44bdbe4b75803712e174502b3d76ddd4d973f65af86e9c7dbbe0e7ed9c

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