Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d2f882fd581273…

MALICIOUS

PDF

111.7 KB Created: 2021-03-14 08:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38cc05f1e23a1ac27336fc7b1e325951 SHA-1: 745d1577e01a24617ba224bbd3da1cad8333b7a7 SHA-256: e2d2f882fd581273362f45b1dee97ccd3287a71f64c72550990a27cdff73c38d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated SEO-style links, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate maliciousness. The primary malicious URL identified is likely used to host a phishing page or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/award?keyword=abnormal+psychology+the+science+and+treatment+of+psychological+disorders+pdf
    • https://cdn-cms.f-static.net/uploads/4412887/normal_60298860a823b.pdf
    • https://cdn.sqhk.co/lawafopugu/UAIaDQU/21278118447.pdf
    • https://static.s123-cdn-static.com/uploads/4449771/normal_5ff32a4d1796b.pdf
    • https://dabosimupit.weebly.com/uploads/1/3/5/3/135397997/jidevepaketot-papifida-xegub-tabobo.pdf
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/610641.pdf
    • https://static.s123-cdn-static.com/uploads/4408460/normal_5ff8c8a819446.pdf
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff7b0c649e18.pdf
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/burekepuxawafisuko.pdf
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/zozavirubigi.pdf
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5fe3d628b7ca2.pdf
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/7165578.pdf
    • https://cdn.sqhk.co/tudosiki/hbjhngg/33918698143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_a38bca7fd13b4629bc2761e46c922669.pdf?index=true
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_912953545c364e4490523f3cd1fddc94.pdf?index=true
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_acf230ef81244112bdc240c88f8150bf.pdf?index=true
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_28cbbea6257e4772a60a4b287621f461.pdf?index=true
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_7cc660b4f0604a58b42690a45ce71146.pdf?index=true
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_a0d057321514494da64577fbdae7091c.pdf?index=true
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_6189ee0f90b34353a940be2860587da2.pdf?index=true
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_79061e9a481541b09e7abdb4626deaf1.pdf?index=true
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_a6947d19f3f9475187facab239788c37.pdf?index=true
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_92012c9b3c374178b125a8d72afebc86.pdf?index=true
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_b9e92b400d7f480cae487a7b43fe676b.pdf?index=true
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_1f90c23d9eb24c279f858d6e7baf4b79.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_off00017561.bin
17182f411addcdc8e7d2b575a3a44fad7acbdf84116865d153008cd3a59e8108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17561 5800 bytes
font_01_sfnt_off000188fc.bin
c567a79b733d0e606236df0e825d5c5c9e8828197872cf7a15d18f5b68257093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x188FC 11700 bytes

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