Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed10245d49bb946…

MALICIOUS

PDF

84.4 KB Created: 2021-02-28 12:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f7b467c70e48950ac0498ce595a9272 SHA-1: e1266751cbcca41e3db7450dc022598f4e72bd42 SHA-256: fed10245d49bb9465bb6b16fab3df47dd6ed98654415ae65bc89e64786e30088
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/wix?keyword=ti+83+plus+ce+online PDF link annotation
    • http://dazomasuw.22web.org/34972577305.pdfIn PDF document text
    • https://benarejara.weebly.com/uploads/1/3/1/4/131407695/0636347ece28.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/how_long_do_you_charge_simplehuman_mirror.pdfIn PDF document text
    • https://jomijumad.weebly.com/uploads/1/3/0/9/130970003/zaromatadojo_nesemi.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/coleman_powermate_maxa_5000_er_specs.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_use_omron_intellisense_wrist_blood_pressure_monitor.pdfIn PDF document text
    • http://bafedudovodamo.medianewsonline.com/a_midsummer_nights_dream_act_5_modern_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408461/normal_5ff7c5e01ed00.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/is_lean_six_sigma_white_belt_worth_it.pdfIn PDF document text
    • http://leledup.mypressonline.com/bakidukowajorupawaj.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/1353228.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
    • http://fufifaramulemi.rf.gd/34987891738.pdfIn PDF document text
    • http://gizezusofozud.rf.gd/latest_android_update_for_s7_edge.pdfIn PDF document text
    • http://pozimefenud.epizy.com/lefuxijuzobenoxawenige.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/40831786727.pdfIn PDF document text
    • http://joladarebipozu.rf.gd/compare_and_contrast_articles_3rd_grade.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 4732 bytes
SHA-256: a6d2155dc37935c28817ca0c051f48e8d45a0bee2497e4b9ebac62a4bc7de7a1
font_01_sfnt_off00011075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11075 11924 bytes
SHA-256: 4175fd9f020ded0e02774019fed7b869087be72bc5226913d5164a23db477a87
font_02_sfnt_off000136c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333