Malicious PDF — malware analysis report

Static analysis result for SHA-256 971d3077b6ecbc8f…

MALICIOUS

PDF

65.0 KB Created: 2021-01-16 05:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 40fb8f599e888edbd6cac370e55c5bf4 SHA-1: 93a4f98e8fb376c014cad460958235f41e09fcb7 SHA-256: 971d3077b6ecbc8fe9cd9ebe835b898d8a6269d0feab62b9ea64a20fbcd462e5
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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://cctraff.ru/123?utm_term=scosche+dash+kit+for+ipad'. This URL is likely used to deliver a malicious payload or phish for credentials. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a phishing trojan.

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://cctraff.ru/123?utm_term=scosche+dash+kit+for+ipad In PDF document text
    • https://site-1201024.mozfiles.com/files/1201024/invoice_templates_in_word.pdfIn PDF document text
    • https://site-1178683.mozfiles.com/files/1178683/hd_lock_screen_wallpapers_for_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5fc25f4b03a84.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/CieYiiZ/monster_rush_godzilla_kingkong_casual_gameboy.pdfIn PDF document text
    • https://site-1177354.mozfiles.com/files/1177354/world_inbox_general_knowledge_download.pdfIn PDF document text
    • https://site-1173664.mozfiles.com/files/1173664/save_base64_to_c.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/heKbnhc/diversion_dance_roblox_id.pdfIn PDF document text
    • https://site-1176155.mozfiles.com/files/1176155/majesty_northern_kingdom_apkmania.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/xijuxosisomuna/toxasadorerabaxiz.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/18182299830.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/fovopavob.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/staff_handover_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/44302762333.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_off0000bfcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFCC 5376 bytes
SHA-256: bd0ef269d95a2aa8547fc82bfa9b7152b221150d08d5e754cc846b9f903c17dd
font_01_sfnt_off0000d216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD216 10456 bytes
SHA-256: dcdc646cc77fbf1e374b67837a2dd35010b2e181fa016723c80736dd51aded0c

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