Malicious PDF — malware analysis report

Static analysis result for SHA-256 c566fcb252cf6237…

MALICIOUS

PDF

152.1 KB Created: 2021-03-04 22:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 22db5ff6d40381e2f711f09b8763bf89 SHA-1: ddf9abb4246b0aef599369b49ded505dfa34ade5 SHA-256: c566fcb252cf6237a2344bd468521db8673a6c455d929d4ce3d5e677af14fb24
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous disposable hosting sites. The presence of external URIs, such as https://ponafet.ru/strik?utm_term=metal+gear+solid+1+release+date, further supports the attack pattern of luring users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=metal+gear+solid+1+release+date PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4428045/normal_5fca908cbf344.pdfIn PDF document text
    • http://zitugaxusi.mygamesonline.org/99578141667.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/317011901758olaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fd685b347c79.pdfIn PDF document text
    • http://datingsexchat.site/basic_anatomical_termsvgh24.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/gfdE0sf/gadutagotonogalidilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503584/normal_5fe19d3737fc9.pdfIn PDF document text
    • http://manybigs.space/dnd_samurai_5e21m66.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ahfatjd/video_editor_online_free_for_youtube.pdfIn PDF document text
    • http://healthytrands.com/nalerihecn9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377656/normal_5fc9166834bf5.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/41732633404.pdfIn PDF document text
    • http://luminar3-download.xyz/retractable_baby_gates_for_dogs67e3i.pdfIn PDF document text
    • https://cdn.sqhk.co/xanuramalu/jc5ijhh/word_connect_level_1516.pdfIn PDF document text
    • http://trastqort.online/vadarijolajulipezoe0wr1.pdfIn PDF document text
    • http://fredo.run/best_ebook_app_android_2019x2bwg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494149/normal_60235256d619c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/bose_soundsport_headphones_user_manual.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/44067223138.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/66542532013.pdfIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1D9 17768 bytes
SHA-256: 11654c699cc12bc68f8c7bbafd7cd53882a7f07749e5c906a05f83c9806df508
font_01_sfnt_off00020b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20B1F 4732 bytes
SHA-256: 48c121e183dd45d5523d96995915c5e1b1199fd2700ef8b03e33d304dcd7a47d
font_02_sfnt_off00021b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B49 12232 bytes
SHA-256: c8dd93542c3107d78d7deb0d4c09814dbac81a5deb1c172dc08a7541caff907b
font_03_sfnt_off000243f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243F6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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