Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fc14121e2f8051…

MALICIOUS

PDF

73.5 KB Created: 2021-03-02 13:45:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: da81b7646cc5058c34f78c6f1c293187 SHA-1: 01d07ff91a0650f89a5a57c45de07efd2798c35d SHA-256: 63fc14121e2f805100ada8ffc7945d8c5e1e77c0e67733b6a0791610364d4f1a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojanized document. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation, suggesting a lure to disguise the malicious intent.

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
  • 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://yafferge.ru/strik?utm_term=the+way+of+analysis+pdf In PDF document text
    • http://healthytrands.com/91826881876puamr.pdfIn PDF document text
    • http://momentikshop.space/jujipoc4m0y.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/gekupajitinaw.pdfIn PDF document text
    • http://usene.xyz/belkin_n600db_wireless_router_manualorv2q.pdfIn PDF document text
    • http://shopee24.site/bounty_hunter_2_metal_detector_manualphkzd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5fed6bf262a5d.pdfIn PDF document text
    • http://websporizle3.com/lodutuweuoulu.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/star_wars_the_jedi_path_and_book_of_sith_deluxe_box_set.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/pusori/nctb_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/flight_radar_24_gold_cracked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/abdominoperineal_resection_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/du_speed_booster_old_version_app.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/adobe_premiere_pro_cc_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/dajulufelanogenenulevaze.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/46115572183.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/singer_toy_chain_stitch_sewing_machine_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/rifalevomizox.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/19675410231.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/100g_apple_nutrition_information.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_off0000e50f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50F 5176 bytes
SHA-256: 1605d708472822c1852aceb21ae117014d232ae7b187baa75fee8c8b2df7e19c
font_01_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 10020 bytes
SHA-256: 0d060de829782436785584325c1a618918ad2c7d3736602e251666339b70459e

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