Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcca3058c1c9c8c…

MALICIOUS

PDF

69.8 KB Created: 2021-01-10 13:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3aafcc8f836dcb6812c89b360d5bf66a SHA-1: 12d999da02505e8b2afffac99845f1f8a54ce0e3 SHA-256: 4fcca3058c1c9c8ca8150bedc23b823350d2bec9a259019128debfe3cba21903
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/aws?utm_term=imperfect+vs+preterite+spanish+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492897/normal_5ff8477751351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5fdadbab5176a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_5fdc37a1bf2a2.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/gchdW5R/cbse_9th_class_science_chapter_solutions.pdfIn PDF document text
    • https://site-1178312.mozfiles.com/files/1178312/self_certification_form_template_uk.pdfIn PDF document text
    • https://site-1173288.mozfiles.com/files/1173288/most_secure_wifi_calling_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5fd0a6cab06c3.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/qgdtPie/nanidokimatarelarisobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5feb86ab3afdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5f938d837a4c8.pdfIn PDF document text
    • https://site-1175775.mozfiles.com/files/1175775/live_five_news_election_results.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/muvemasoxaji/bingo_bash_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/zanabixarexosin.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/us_open_draw_sheet_today.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/45855450185.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/jobuwopigeboxevojutonijus.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_off0000d119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD119 5376 bytes
SHA-256: 58cd7a2bd506565f2aff7d579a969ca6970398f506ebc7a6db36b530d293fa51
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 11424 bytes
SHA-256: edd0900011b6623beaa9db2725db5aba2cdc0adfd04c4bab0a81f778fd78c031

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