Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ede41632d0324d9…

MALICIOUS

PDF

75.5 KB Created: 2021-03-25 16:10:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3a9543c660a50c042ee4045999722df0 SHA-1: 2b321c679e2db02861dfa86d6fe3d0924cc686c1 SHA-256: 4ede41632d0324d99b8389eab5248247becd54e2b0bda0b958c902b967767778
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL that redirects to a suspicious domain, likely to trick users into downloading further malware or providing sensitive information. No scripts were extracted from this sample, but the presence of a malicious URL and the overall detection profile strongly suggest a phishing attack.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://golowaki.ru/strik?utm_term=how+to+operate+a+boiler+heating+system PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404108/normal_6026ea5a275b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460043/normal_60005d988b7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402740/normal_600ef61ed7d71.pdfIn PDF document text
    • http://geesecam.com/928796636896cvil.pdfIn PDF document text
    • http://normaa-id.com/photoshop_tutorial_step_by_step_in_hindikavq4.pdfIn PDF document text
    • http://orbitan.fun/draw_tite_activator_iii_troubleshootingb2xhu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab3485d-70e7-4706-bfc7-3df4baa3350f/puguje.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/mifidinasakokuletazisoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f9dc44-7ea8-4030-9ca7-7d8837f8720e/how_to_reset_schlage_electronic_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52817467-a2e2-4ce6-837e-d01a0c1281a5/campark_trail_camera_t45_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a78ce0-0fad-4eea-aeb1-693e29504703/quadra_fire_gas_stove_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/piano_chords_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f18079-2830-4f7d-8c79-9d2c38a7c2a6/brother_mfc-j5910dw_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08539bf-72ec-41c3-be52-b89fe85a6cb3/kejunut.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/lord_i_need_you_lyrics_and_chords_ukulele.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/cuneiform_bone_spur.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/cnet_s_free_vpn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e938976-dee3-4701-9988-8719eb5d7494/zanukaxelililusi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/novapatunavusemade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de4413c-d6f8-4bc0-8981-47205262c501/27058686953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7ddd6f-650a-41db-9728-15d7193dbaa8/norutufesikarejusadasin.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/dieta_para_aumentar_masa_muscular_hombres.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/telugu_moral_stories_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827ffa43-cb05-4295-9b4d-fd82949aa3be/xokide.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_off0000e9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CC 5528 bytes
SHA-256: 80873d9c74a2fcccfa5de4cfae0153f295f3f3934c6e8a7f09883d69d89449e3
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 10320 bytes
SHA-256: 4f245bd1abfb0572efb549ad437193f7fc34603b7a4423e12880572b8cf07a73