Malicious PDF — malware analysis report

Static analysis result for SHA-256 5349c3587b6fe36e…

MALICIOUS

PDF

69.4 KB Created: 2021-03-09 22:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 47a5d7ec896b697ddb3cb32769ce46d3 SHA-1: 480101f82a69d3fea12f894fd17948e77a5eb4fd SHA-256: 5349c3587b6fe36ed3092efef6821d665b4ba66fe480d1b2b2c4b1aacf73dd08
116 Risk Score

Malware Insights

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

The PDF contains a malformed stream and an external URI pointing to a suspicious domain, indicating an attempt to trick the user into downloading further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of external URLs and the malformed stream are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://gimoguvi.ru/award?keyword=automotive+technology+a+systems+approach+6th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/retesixabe/5hblMAf/dolubomixu.pdfIn PDF document text
    • http://birjand.design/how_do_i_know_if_my_washer_is_high_efficiencykdn3b.pdfIn PDF document text
    • https://cdn.sqhk.co/xozifejor/djdeKBq/western_wallpaper_for_phone_cute.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/FjcPRgf/hakuoki_warriors_of_the_shinsengumi_iso.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/YeTxhek/lusupe.pdfIn PDF document text
    • http://lighterusb24.site/fejitonibogufi9og7a.pdfIn PDF document text
    • http://ottics.ru/characteristics_of_correlational_resq83z6.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/hijfKgd/victory_missionary_baptist_church_las_vegas_ustream.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/hejd7ia/sky_whale_game_free_download.pdfIn PDF document text
    • http://bupro.asia/vevarilubojaratc2auc.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/ihCibKL/56576530447.pdfIn PDF document text
    • https://cdn.sqhk.co/sevalaturi/qHyjgTs/scoreboard_basketball_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/elgdghh/football_prediction_sites_soccer_predictions_for_today.pdfIn PDF document text
    • https://cdn.sqhk.co/jokalirubore/gYZichj/fikov.pdfIn PDF document text
    • http://phtech.site/spectrum_tv_remote_control_applw5pm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d31e7161-a309-4570-aa9b-725a70eb134b/57904145663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bba0115-8ca0-4b2f-a9e4-b3ed5a30d15d/fly_tying_bench_orvis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d76c699-a2f0-4216-a9e6-409e4b7e087c/jatefuvijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bed5f45-87c9-44b8-8f94-d3889cc642d8/94004668456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3a8f2f-3579-4d59-9520-b09f6677064d/dirt_devil_power_express_lite_stick_vacuum_red.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c311a6-f47b-4bbf-8749-e1f222dcc08c/how_to_stack_a_kenmore_front_load_washer_and_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce8421a-9688-435b-bd76-cc36433a9b23/realidades_3_workbook.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_off0000d212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD212 5876 bytes
SHA-256: d77e9197c7d2617cd86914b90246284f4b7b4615ea6242407345802c1165ba92
font_01_sfnt_off0000e5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F7 9780 bytes
SHA-256: 759d1edd9fdc69ef175553910510bb6b9a4c704d6fd3cf03c985f9c801397d57

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