Malicious PDF — malware analysis report

Static analysis result for SHA-256 83492352e365d28a…

MALICIOUS

PDF

73.4 KB Created: 2020-12-26 00:47:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9a3725e1fa9111a82564e2ca2da9efbc SHA-1: 992725d193bea363a3869eff67a83b78bbf7e714 SHA-256: 83492352e365d28af6d33c012bd4b471cd93cda18b2883ad8e193966ea3eab81
170 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link that redirects to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic and the 'ML_NYX_PDF_MALICIOUS' flag. The document body, though heavily obfuscated, contains text related to 'nba2k15 vc hack no survey no download', suggesting a phishing or scam lure. The presence of embedded URLs and the critical ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nba2k15+vc+hack+no+survey+no+download In PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jeGjijf/the_light_between_oceans_ending_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fe6639ca5211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5fdc25d3d6a65.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/jh5Ghem/mermaids_1990_full_movie_123movies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f9ae151caee8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5fadf8a43664e.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/zupenafud/swarm_app_blog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f38fbd-9e09-4341-9d5d-4c82a36289bb/90009498683.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/chemquest_29_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5e7e19-dfb8-49fe-a407-5ee97d8b3151/ronuwelakolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be80192d-5cd4-4646-a083-663222ee7bff/tufted_chesterfield_sleeper_sofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25b3aa04-d202-4e86-92bf-b8bbf6111f9f/bersa_thunder_9mm_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04ebcce-f9ac-420d-9134-a2ca85e44a49/bostitch_n80_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/087201c4-f06d-456d-a372-e537ae0cc08f/39528440255.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_off0000e008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE008 5760 bytes
SHA-256: 820bedfae702ac6a0b8d72c4ad533290742034935e7b82c6dd78e4b2a17fc515
font_01_sfnt_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 10736 bytes
SHA-256: 2dfe5105f25f8296aaba6c2d4541689e40e362cdd630ccdd9022a2c92f834f0f

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