Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deed58198e7fb0c…

MALICIOUS

PDF

78.8 KB Created: 2021-03-14 14:34:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 34e18404828f899b6cfc0d1c64a3c7dd SHA-1: 7ff2fa57d4a17eabbce7e52678067c8b9d201ba5 SHA-256: 7deed58198e7fb0cbbb9a5b17fdd704685703e715a3b1726e503b12665d26dc1
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by multiple heuristics as a critical threat. The embedded text, though heavily obfuscated, includes a lure related to 'casting director' and the wkhtmltopdf application, suggesting a phishing or malware delivery attempt. The presence of a malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • 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.
  • 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.
  • 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=call+me+by+your+name+casting+director In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5fe2f75f704c9.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/eRjbm4O/likabusivux.pdfIn PDF document text
    • http://sbrf.link/a_level_biology_notes_znoteshu5z4.pdfIn PDF document text
    • https://cdn.sqhk.co/bulamije/rMQo8ig/54433647768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_603d1bb3c609f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409799/normal_604da99189dca.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzixapudel/jVhNjaq/zombs_battle_royale_apk_game.pdfIn PDF document text
    • http://timecodes.net/35201285693n2x08.pdfIn PDF document text
    • http://verifybadgehelp.com/por_que_le_salen_granitos_en_la_cara_a_los_recien_nacidosqk0co.pdfIn PDF document text
    • http://geesecam.com/821947134bhhn6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_602a514e88bb5.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/hMicgj1/block_tank_wars_2_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374364/normal_601dc3c719e18.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/woxewiwupir/weather_report_of_jessore_bangladesh.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/78547941036.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/norton_security_antivirus_premium_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bce77d-37ce-467b-9ff7-5e11817dec66/songs_like_la_la_land_bryce_vine.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/cual_es_el_salario_mnimo_en_mxico_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/2598905436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa1baa18-ada4-41cd-b3da-0f138d31add3/lycoming_o-320_gasket_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9c126e-3cfe-4a40-a8c0-d5a519ffdea7/jusizunag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5547be-f059-41f7-86c4-b625d8a25aa5/tutafusevosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d94682-b825-4084-a30a-d1b9dee50433/96772925878.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_off0000f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 5404 bytes
SHA-256: d06f638150e419083cdfe776478f96c118569af7d24cd6c6b872c4d1fa1a26db
font_01_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 11240 bytes
SHA-256: 79fd4dbbd465dac43f2639b81a1d1bbb97e63083290babde2d4842fa51f73404