Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece68328bac79bb3…

MALICIOUS

PDF

80.5 KB Created: 2021-04-10 21:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f3b35d8e6cfcad23be76c763d50b8f48 SHA-1: 996ac92802a04a79bc76bc72ea521e47752ed12e SHA-256: ece68328bac79bb379525f84f2c032f67d1408de9ee966f3c9e2b3d5fd2f1ffa
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 0.9991

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://leonvi.ru/strik?utm_term=where+do+i+begin+quotes PDF link annotation
    • http://vykupavto54.ru/finite_element_method_by_sb_halesh_downloadrcskk.pdfIn PDF document text
    • http://sk-anker.ru/does_siemens_still_make_hearing_aidsiqkl0.pdfIn PDF document text
    • http://sentytld.online/304691977141j9kx.pdfIn PDF document text
    • http://theharaka.online/vampire_diaries_season_1_episode_synopsis69gbt.pdfIn PDF document text
    • http://smallita.space/50_nuances_de_grey_netflix_version_elliotzn900.pdfIn PDF document text
    • http://bifokagomasema.iblogger.org/treanda_prescribing_information.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/jdjjigm/top_10_music_player_for_linux.pdfIn PDF document text
    • http://nosusodedeto.22web.org/argumentation_and_debate_freeley.pdfIn PDF document text
    • http://merishwheelrecords.com/255307743078zgqe.pdfIn PDF document text
    • https://cdn.sqhk.co/bebomopakax/hjEhelW/xobamilux.pdfIn PDF document text
    • http://salopkisa.website/zufevokusorcahpm.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/ihijLha/begizizika.pdfIn PDF document text
    • http://xteenware.online/best_camera_focus_app_for_androidjoegq.pdfIn PDF document text
    • http://wonder-ita.fun/galaxy_wallpaper_hd_iphone_xq50gq.pdfIn PDF document text
    • http://gufutaca5.xyz/64407021157vtqf9.pdfIn PDF document text
    • http://timecodes.net/best_shooter_games_2020_pcgz6ds.pdfIn PDF document text
    • http://dowowuvaz.iblogger.org/taduz.pdfIn PDF document text
    • http://aarbuz.space/university_of_birmingham_school_ofsted_reportnapnv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_fdd066b4df734f7692f30cb8b16d7da1.pdf?index=trueIn PDF document text
    • https://b1f0a730-f0e4-4bcf-918d-a915077b90d0.filesusr.com/ugd/a7c69d_779039b428d84967ad144665bf491cd9.pdf?index=trueIn PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_9df4d48ad46446d7a5d549eab1f87a86.pdf?index=trueIn PDF document text
    • http://zefitog.epizy.com/xeluwoxoleriwutog.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_0ff855a069cc408ca93a0074ccb83a72.pdf?index=trueIn PDF document text
    • https://f3215690-35ba-4bce-915f-db1a6f912a1b.filesusr.com/ugd/d32599_53489810db7e4b06bce18a62a6ff5f0f.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB8 5124 bytes
SHA-256: 32fbccfa8c7fed5aad4480b6219f172c10f6608fcf2c001c7c721d957fcd7318
font_01_sfnt_off00010f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F23 10944 bytes
SHA-256: 47532878816ccaef0848aa93beaa188d2e83d6262532ef5f0394da7bf492bdc6

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