Malicious PDF — malware analysis report

Static analysis result for SHA-256 6865a3cbcb0ff53f…

MALICIOUS

PDF

75.2 KB Created: 2021-02-09 06:12:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d83f28ff1a7ecb4da50f472839596dac SHA-1: dde5faf7294cf860930cfa4a0ea7ef2c7a4e8920 SHA-256: 6865a3cbcb0ff53f0cc289342b141d4b0809769f003bc86615a4a93bd77c0ef4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=3d+printer+parts+list+pdf'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=3d+printer+parts+list+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_601baccdc2202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fd17fe3c0f5d.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/hdgf6k7/software_data_cable_which_country_app.pdfIn PDF document text
    • https://cdn.sqhk.co/gasajolop/hjFf1Ya/excursiones_de_cruceros_por_libre.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/AMhfLdU/emergency_dentist_near_me_that_take_medical.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5ff6ad3a40c4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401732/normal_5ff2606b29d81.pdfIn PDF document text
    • http://tryadasert.online/82369023291py159.pdfIn PDF document text
    • https://cdn.sqhk.co/tadanopi/jcUjbvs/robotech_ace_pilot_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jaruxabal/8GrtldY/gunipujejovab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novifamigot/93422296300.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/13891008205.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/zotezapusebidonaxafupu.pdfIn PDF document text
    • http://zanukabijegur.rf.gd/high_mast_lighting_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/loan_appraisal_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/goxewomazikibijosuk.pdfIn PDF document text
    • http://wexiwukivenuxaf.rf.gd/goruzomenetur.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/bomgar_representative_console_windows.pdfIn PDF document text
    • http://xavobuwog.epizy.com/born_to_be_wild_guitar_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/xukoxoxepekalorazif.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5104 bytes
SHA-256: f6433eac8e3e01d627e05a0c8c55143efd2cb7c833f219b86f186be794b1be36
font_01_sfnt_off0000fc1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1D 10440 bytes
SHA-256: 5f01a9c6136385c5e18ffd5f248ed80b06978453c65fed7da10e707ba5c74245

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