Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fdd6c0e3ffc1078…

MALICIOUS

PDF

75.8 KB Created: 2021-02-28 12:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f3c3e325ec349edf555715ab045c9041 SHA-1: 5528242e4cea04e045759a1b29c4ce8519bfb0b5 SHA-256: 1fdd6c0e3ffc1078e9b38bb83cd0e69b1ddb3cd7b5af86ddfd23056d2a2d0819
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/strik?utm_term=evh+5150+lbx+review In PDF document text
    • http://shoop-fo.ru/escape_room_zombie_londonwfniu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_5ff48006b5969.pdfIn PDF document text
    • http://honey-love.ru/46423932175gq6l6.pdfIn PDF document text
    • http://yeswins.space/langston_hughes_salvationvrhln.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448103/normal_603ab9ed3c7ae.pdfIn PDF document text
    • http://maska-respirator.com/nj_transit_monthly_bus_pass_zone_1l7370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sukeboragepude.epizy.com/wu_tang_clan_hulu_season_2_release_date.pdfIn PDF document text
    • http://dosekidonara.epizy.com/masikaxagoxe.pdfIn PDF document text
    • http://wilogoxe.epizy.com/automatic_air_vent_revit_family.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/73646158560.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/fatitewutime.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/polaris_high_lifter_1000_side_by_side_for_sale.pdfIn PDF document text
    • http://sovizaz.epizy.com/how_do_doctors_tell_the_difference_between_viral_and_bacterial_infections.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/56659558218.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/half_life_and_radioactive_dating_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/best_ebay_store_templates.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_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 5020 bytes
SHA-256: 49c629beffd443cbd0b0b2cb4a507fe8f6ee17f2ef4d642be856ea7058583ac4
font_01_sfnt_off0000fd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 11016 bytes
SHA-256: 727f1bfd944e1a4d44e847525f57c7557d22d0150fb6cc55b692efb42841c094

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