Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbffcd6a12b0528…

MALICIOUS

PDF

73.6 KB Created: 2021-03-26 08:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: aeda551a8fa16dfd47fc30257d1d43bb SHA-1: bb51be29fdb31d41eb99f3baaa4d5978baa9e10f SHA-256: acbffcd6a12b0528a3abfd8442542c980fc7da16dd2f48ad302cf417e6ecd7a4
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a likely attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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
  • 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://xajibur.ru/award?keyword=apostila+mecanica+automotiva+senai+pdf PDF link annotation
    • http://doruguduku.iblogger.org/lajilamezomazigokulod.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvitatutuv/bjggij9/fajoved.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/hgW8p9t/easy_care_pulse_oximeter_ec2520.pdfIn PDF document text
    • http://healthytrands.com/82241790258gzch7.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/8Abibih/69103586528.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/6heQ2R5/paderuse.pdfIn PDF document text
    • http://kovuguzi.22web.org/towezodo.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/geZghjE/bujebem.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/why_wont_my_shift_gear_move.pdfIn PDF document text
    • http://minesaxofunawi.getenjoyment.net/57920205961.pdfIn PDF document text
    • http://bossyonlinex.com/47227440081iulhv.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/installment_agreement_form.pdfIn PDF document text
    • http://juzagunugix.iblogger.org/adobe_photoshop_brush_tool_free.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/dokaminapewafot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuzuvulas.epizy.com/cetoconazol_xampu_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/6256433566.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/digazozo.pdfIn PDF document text
    • http://pajupap.rf.gd/basic_digital_electronics_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/jajeralej.pdfIn PDF document text
    • http://wozetarep.rf.gd/longman_academic_writing_series_2_free_download.pdfIn PDF document text
    • http://womejus.rf.gd/anaerobic_respiration_fermentation_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/balance_sheet_sample_ifrs.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/english_speaking_practice_software_free_download_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/grid-_template-_columns_not_working_in_safari.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/28031457003.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 5252 bytes
SHA-256: 5d9c30df5a34949495a47b02f7f0d65e45b3296ee2f63981f522adf2b083ee8d

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