Malicious PDF — malware analysis report

Static analysis result for SHA-256 9671e22e65628476…

MALICIOUS

PDF

77.8 KB Created: 2021-03-21 12:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0564f06de2ead0d814a91856ebb1c87 SHA-1: 97199ea3bc2530b1fc3fc0ae9358083c90a84db1 SHA-256: 9671e22e65628476a37cd4aa0bbbd90e43e15a426304820137be4d5bb63301c5
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 SEO-optimized to appear as legitimate search results. One prominent URL, 'https://jacksth.ru/award?keyword=acrylic+painting+tutorial+for+beginners+pdf', suggests a lure to a website that may host malicious content or phishing pages. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=acrylic+painting+tutorial+for+beginners+pdf
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd671301c8ae.pdf
    • https://cdn-cms.f-static.net/uploads/4460463/normal_5fd163237d25c.pdf
    • http://zelolugo.22web.org/yaesu_vx-7r_manuale_istruzioni.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/retobifulipo/spring_boot_interview_questions_and_answers_javatpoint.pdf
    • https://uploads.strikinglycdn.com/files/30720f6e-d397-414e-a8cc-ed5e2994ff27/banisawuranejujime.pdf
    • https://uploads.strikinglycdn.com/files/1d8ca7ce-dcab-424a-b64a-81300bd8a445/48910619895.pdf
    • https://s3.amazonaws.com/tiniruru/widiwerijawoj.pdf
    • http://vugugoma.rf.gd/vista_128_delete_master_code.pdf
    • https://s3.amazonaws.com/takebemanijewok/report_twitter_user_for_harassment.pdf
    • https://uploads.strikinglycdn.com/files/daa544c0-de91-4770-8042-808b4f2cfbd8/how_does_a_star_chart_work.pdf
    • http://porevinivija.rf.gd/xifirosubanazekej.pdf
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_80c44313380e4a96aea9339de10e0454.pdf?index=true
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_9664ece2b66e4a12834032f254640227.pdf?index=true
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_c6688c4f720f4812bfa74c006a9d108c.pdf?index=true
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_7e23bbbf6ee7408f9b6f42d47ebee1ac.pdf?index=true
    • https://s3.amazonaws.com/jarirotexab/muxonigeladuzitanuxez.pdf
    • https://s3.amazonaws.com/gonima/all_in_mark_batterson_study_guide.pdf
    • https://8ca15cf9-c5bf-4329-906a-32df3c7b5ab7.filesusr.com/ugd/4ca7f5_e882e4509e194cdea6944c27ffa5455f.pdf?index=true
    • https://5d9de69b-f80b-44d6-9c2d-9027806fef0b.filesusr.com/ugd/e26ad2_79fb4d39ade6479984e4bc6fb1492bfd.pdf?index=true
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_68cb06afcebb43c2b4c776e5bfef2f5c.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_off0000f1a6.bin
91497b17fa2232d470a24eb0a45e582484897b030cae576c13a1a9c4932d494b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 5552 bytes
font_01_sfnt_off0001049d.bin
2d035dd4d0c465f073720bb037413783b88f266699f91c007f2652b063a5e54b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049D 10820 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.