Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d822ee7164894da…

MALICIOUS

PDF

87.8 KB Created: 2021-03-31 23:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc75f968c51dff5e367d01a956b9112 SHA-1: de69ca0e57533691029dd3b0dd8b855b0a430b66 SHA-256: 2d822ee7164894da317af79cd51a44f34b62768c2db89fb928f9ba5f7e6100f1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The embedded URLs point to various domains, some of which are likely used to host malicious content or redirect users to phishing sites.

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-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://jacksth.ru/strik?utm_term=freddy+5+nights+game+free
    • http://biomaniix.website/71682956088uwz3l.pdf
    • https://cdn.sqhk.co/nemazuwigumo/hJdigjg/cops_and_robbers_map_minecraft.pdf
    • http://ketousa.site/zachman_vs_togafpxi2f.pdf
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/5720901.pdf
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/wadanin-rotov-bakid.pdf
    • https://cdn.sqhk.co/zubuwebofe/JggE1qH/vuxegozuk.pdf
    • https://cdn.sqhk.co/dikapagoloza/ZdHijrs/wivekagas.pdf
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/vagesetebof.pdf
    • http://adanakebap.org/background_image_girl0rwx7.pdf
    • https://fegeletori.weebly.com/uploads/1/3/5/9/135964279/37d77ebfa92a.pdf
    • http://allwoman.site/nostro_account_meaningcpbj0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bb92e1cc-1d9a-47f0-ab96-d187e0aee6ee/67638179338.pdf
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_65f720322565406d842706d360e1094e.pdf?index=true
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_7f4e9bc659cf4e52af645111c067aede.pdf?index=true
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_ab1b338bacad415e9fe03237d75147d7.pdf?index=true
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_3941e332413e4e13b0ee60ab408968e0.pdf?index=true
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_0a08b3a510ee4d0488a9f2cea4a7acc9.pdf?index=true
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_3db03cefb28046d5820031dc5fd28b17.pdf?index=true
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_f76fc115a83a4a829594f7168ca20bee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e253bed9-72cd-4e68-a6a1-cdb1e2bd4336/11040412572.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_off00011a5b.bin
f473dd371181b87b33a9212812d5bd53e1d5cd901f7ed1689426ee42be14c77c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5B 5472 bytes
font_01_sfnt_off00012cdc.bin
6396c11a2590d7500c6797ac4b4c77c2791a0aa96db5021f8680f45d36bc004e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDC 10836 bytes

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