Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f4e99055ff75f1b…

MALICIOUS

PDF

69.9 KB Created: 2021-03-14 16:47:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a8b0e518b7a72c1778ccd20d8963e7cc SHA-1: bed9ac405e3281e1e246e2dacd4a157de7fa48a0 SHA-256: 0f4e99055ff75f1b5e095dd08cafd2ba7d2db8d1be27f472b5fb5a8518307054
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=edelbrock+1405+manual+choke+setup PDF link annotation
    • https://pamaridefudeluz.weebly.com/uploads/1/3/0/7/130776324/wozesusur_buves_vagiwanagipebar_patarozog.pdfIn PDF document text
    • https://cdn.sqhk.co/rasetiwulipu/beChXJa/70931903080.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekasip/abIgcha/sexaxipusurodaro.pdfIn PDF document text
    • http://sidegut.22web.org/how_to_smoke_a_pork_shoulder_roast_in_an_electric_smoker.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/33623af3bc5fe.pdfIn PDF document text
    • http://kuzojud.66ghz.com/vlookup_example_sheet2.pdfIn PDF document text
    • http://faviwogewe.iblogger.org/divezo.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/samuele_bacchiocchi.pdfIn PDF document text
    • https://talurepif.weebly.com/uploads/1/3/4/6/134603846/wemefozazelup.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/fcf0827f8c4e8e.pdfIn PDF document text
    • http://merekidade.22web.org/nenoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/Vjf36cZ/stick_it_faber_castell._it.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/gdcgcyW/simple_sandbox_2_future_update.pdfIn PDF document text
    • https://visufevulun.weebly.com/uploads/1/3/4/3/134310134/vexogugodat.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/jchijgP/download_offroad_bike_racing_3d.pdfIn PDF document text
    • http://gopefafapojawod.iblogger.org/bowflex_power_pro_xtl_recall_parts.pdfIn PDF document text
    • http://mawuluma.22web.org/cps_firefighter_test_study_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ferebazuvitu.epizy.com/accelerator_pedal_hard_spot_information.pdfIn PDF document text
    • http://kodabaguditu.rf.gd/shadowrun_second_edition.pdfIn PDF document text
    • http://xufizup.rf.gd/introduction_to_accounting_curtin_book.pdfIn PDF document text
    • http://dujoserowumil.epizy.com/minnesota_vikings_injury_report_week_8.pdfIn PDF document text
    • http://zajegugolex.epizy.com/azure_information_protection_scanner_high_availability.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C9 5880 bytes
SHA-256: eda719d781af4cd08bb147a2a49086739efa36d84adb0f7980ab817d2f3dfdd1
font_01_sfnt_off0000e4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AD 10652 bytes
SHA-256: d0e329b65d9197bbaa84d86dd457841fa71897b7b27395561d1dd297184a4535

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