Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb829fa8ac8516c9…

MALICIOUS

PDF

88.1 KB Created: 2021-03-29 13:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aeefb4653efae4636d74196f2c17f88e SHA-1: 855eee22bfa662413b5fd74f910301356a8d8564 SHA-256: bb829fa8ac8516c925c7bfcf8fcc620d7a79210b87b0c3c37ce0736321dc1473
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user. The document body, though heavily obfuscated, contains references to 'Ashutosh Maharaj image' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://resalured.ru/123?utm_term=ashutosh+maharaj+image PDF link annotation
    • http://guzanarogenuje.iblogger.org/xorofifigikukoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rijunawep/gk6giic/pocketinveditor_pro_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dudazume/hagglDp/my_pcc_d2l_direct_login.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/fgiihgi/zozevegojibosusal.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/iijLibB/56145437075.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5fe4c84e47504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460678/normal_5fed0251c2fb3.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/gfggcij/email_templates_free_real_estate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://vejozawuxurenij.rf.gd/fegudoxoka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e56d9a-73ff-42ea-b12b-4456c18d1da0/juegos_para_aprender_verbos_en_ingles_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/67766420957.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d374a20-e174-417b-b261-8915fbb83f14/10654310570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c19182-2c3d-4b81-870c-05ae4d791018/movie_editor_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea450b6c-7095-4675-bb3f-52f217e62d70/hp_probook_6570b_ram_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01762220-fb7e-49f0-8974-86b7e4470056/mitunake.pdfIn PDF document text
    • http://lafebevu.rf.gd/mofonumoxukoperi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/603accfc-1cf3-4268-a927-47ea1ac631d1/7798478611.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835e1e3b-ce55-486c-b101-f760349747e6/how_to_scan_multiple_pages_canon_tr8520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/851b34b1-590b-4185-be3f-8be499f0e516/best_figure_drawing_books.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/improving_school_attendance_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb72f98b-a448-4d06-865d-7bef95c14d96/nikon_d40x_body_review.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/6904859403.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10199 5132 bytes
SHA-256: 57c5217594e6511e55884b838979f9d4c61dfcd18f6d9fc6c6ebeddc2f0bbe03
font_01_sfnt_off000112e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 12252 bytes
SHA-256: 1ceba82b845164b4a5a6438d0f5c9f25f064decee55531696350478967752ffd
font_02_sfnt_off00013b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6D 6728 bytes
SHA-256: 548fbd761adcb64b042ed53a640e80b8b312642b3c5e27f74170d4cb10de4f18

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