Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea1da111ff3c495…

MALICIOUS

PDF

81.1 KB Created: 2021-03-13 13:17:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0eb1454bcdd5047974b25227908ffa98 SHA-1: 6eb8b4ec5b15063cbde0728af43624215d9a228d SHA-256: cea1da111ff3c495e536fe9d7634c9d071ce495c5fc8f18bf74a9c865118b4ff
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are designed to mimic search engine results, including one for 'Pantone color chart with names'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO-based link farming to distribute malware. No scripts were extracted, but the presence of multiple suspicious URLs suggests an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=pantone+color+chart+with+names
    • http://pornbustyvids.com/how_much_is_a_used_xbox_one_controller_at_gamestopcas6i.pdf
    • http://reactivascotia2020.com/nezerenosivileketisigojajtnrag.pdf
    • http://rezonansmusic.com/gejofusujkowd0.pdf
    • http://claire-irk.ru/dell_precision_m6800_webcam_driversnmj0f.pdf
    • http://alkostore.xyz/pedidoxowepeja22d18.pdf
    • http://erogan-oficial.site/wegobefugital50jnj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aed0ee3a-d217-4696-a563-de9ff15d6c37.filesusr.com/ugd/f80e3f_ba3cbf5bd06a495b829f82a78056458e.pdf?index=true
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_36fa9c21f586450ba0155baa89bab137.pdf?index=true
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_1be771b928f34978a3a7562f22382a4f.pdf?index=true
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_4c64abccfb374796a445b11b5c8ba4f2.pdf?index=true
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_b45b126c2ab5482ba7c2e11701c4b918.pdf?index=true
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_2c49bc9f04db4e1882234aa930655412.pdf?index=true
    • https://5613ab86-cfe5-4642-b9e1-29ab5e510d76.filesusr.com/ugd/79e000_91410e35dfdc4ccbb5f1d60e327d2169.pdf?index=true
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_8d55d5adf51f44b19f36c0b30b7c3512.pdf?index=true
    • https://2df7536a-ab64-4dd3-a6ca-98e0eca144a4.filesusr.com/ugd/de578f_d8d2bc769f284504bb0c1fdd2e391a72.pdf?index=true
    • https://1058d175-53f8-4d86-9201-ae9c1fc74009.filesusr.com/ugd/62a633_2e61b23e8f3f42f1827d87c26924831c.pdf?index=true
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_fdbd4ecc050f497e87663b4c1dbb5690.pdf?index=true
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_cd943c3e0f674de58d0030b31ac3a06d.pdf?index=true
    • https://27158da8-170d-48ca-a528-b8ced62fe517.filesusr.com/ugd/9fc8c3_6fd6a1a31d5e4672bead39b3acdf4fcf.pdf?index=true
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_1bc2a3e30f184bb0b5f4b184f0f848d9.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e733.bin
8b46d0b8b1f461ae07fe7dc1b9ed3775af0fe3cc6e498c47aae37e0ba8e97614		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 5132 bytes
font_01_sfnt_off0000f88d.bin
2713d70e2787a01909c8a602dd5d9bccbac04822a506679983660bb846c9b428		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF88D 10932 bytes
font_02_sfnt_off00011de7.bin
bfa32af85ed9733e9d329932c5444ef017f43cd1cf31216f18da05059aa2c43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE7 16632 bytes

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