Malicious PDF — malware analysis report

Static analysis result for SHA-256 164139c797a8c3dd…

MALICIOUS

PDF

79.6 KB Created: 2021-03-23 05:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a54bc839c6ddc111ef7415d933ebc69 SHA-1: 9ba07895e5a3afbbf2750fb4d10bf2defa821b68 SHA-256: 164139c797a8c3dd594fa66dbb0001e0871ab18040efb542a937547f55943e18
156 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 phishing or trojan threat. It contains numerous external links, with the primary suspicious URL being https://seumenha.ru/wix?keyword=brown%2527s+morphemes+chart. The document body is heavily obfuscated but suggests a lure related to 'Brown's morphemes chart'. No scripts were extracted, but the presence of multiple external links points towards a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=brown%2527s+morphemes+chart
    • https://cdn.sqhk.co/tisojubew/V5hfjgF/windows_movie_maker_2018_crack.pdf
    • https://cdn.sqhk.co/vosiwuli/Ejcjhib/patewobofewozejupuxi.pdf
    • http://mitutepoka.medianewsonline.com/what_does_the_auld_lang_syne_mean.pdf
    • http://igcopyrightforhelps.com/fadawedhnmhv.pdf
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5ff02a3ab69cc.pdf
    • https://static.s123-cdn-static.com/uploads/4392667/normal_600344e9dd4be.pdf
    • http://goromeo.club/hd_aquarium_screensaver_freevcpka.pdf
    • https://cdn-cms.f-static.net/uploads/4376088/normal_601fc954313b3.pdf
    • http://musofiron.ru/wood_cutting_tools_for_crafts2phz2.pdf
    • https://cdn.sqhk.co/bexutavukaro/jaFhaia/sozofufuvedirir.pdf
    • http://lopitimew.mygamesonline.org/1004901917.pdf
    • http://valigulepi.scienceontheweb.net/manual_del_cultivo_de_pia_en_colombia.pdf
    • http://tofoxewesaxizuz.mywebcommunity.org/brother_mfc_7860dw_print_configuration_page.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_89d32dfa4ce745a2a89c91f281e1ee12.pdf?index=true
    • https://178c1879-e916-404b-9861-a2431bd0f83a.filesusr.com/ugd/1aace6_26f8351317684275b00f864786c014b4.pdf?index=true
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_2cc2692f22e645aab75401fac29b75d5.pdf?index=true
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_b1005cfc7bcd464f816536ea06433437.pdf?index=true
    • http://wumafopid.onlinewebshop.net/xixozalebuxusofemubudawo.pdf
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_8630314191864dd3b789fbf1e092fd09.pdf?index=true
    • https://b3709dad-42f4-4621-9b7e-74d31ca978cd.filesusr.com/ugd/f91cf1_d35a6d81e05e4fc79e16397a6c28e5cb.pdf?index=true
    • https://6bfd3344-23d3-4e03-ab7d-00c1c23eecf6.filesusr.com/ugd/be19e1_808e3b3ec8414509a78ef046e5fd0131.pdf?index=true
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_5d4d7aea6b484a9c8a73ed1dd6fbb159.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_off0000f95f.bin
0967d201d2da7c72e34a44667f8ae4442e47d05e3c403967aae99b1aa4dd26cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 5316 bytes
font_01_sfnt_off00010b63.bin
9388498e02a81b9d98bb8c950dbadc5438657d048ac981a706c39b28a2852b49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B63 10936 bytes

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