Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c6a91b72c63d02…

MALICIOUS

PDF

93.4 KB Created: 2021-05-08 04:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 950d53b230e3eb30293c84d5a7580153 SHA-1: 80630b3eb32c0b782b9b977ba065d6720eb2439a SHA-256: 33c6a91b72c63d021e6e8e7a7b344b51565d74a4ab7ac56168e10d51513fb259
96 Risk Score

Malware Insights

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

The PDF file was flagged 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 deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'quantum efficiency', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=what+is+quantum+efficiency+class+12 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462362/normal_5fc8bef194904.pdfIn PDF document text
    • https://cdn.sqhk.co/xupebasolaw/SfOejb5/vugakojen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_5fcd686657ab7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416144/normal_5fe3a0dbeaded.pdfIn PDF document text
    • http://setugolufifoju.iblogger.org/god_can_do_anything_but_fail_praise_break.pdfIn PDF document text
    • http://wetikufuwigiwox.iblogger.org/91457827774.pdfIn PDF document text
    • http://bosuloridulumo.22web.org/jedupexepijuvudigitepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6041d2204e849.pdfIn PDF document text
    • https://cdn.sqhk.co/wukiratuxazo/ihd5jap/bubble_shooter_3_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_600416b0495ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nadezuj.epizy.com/best_android_games_mods_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/3605618285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c04e82a-3cf3-4d53-81ae-222b9599b89e/what_do_different_oven_symbols_mean.pdfIn PDF document text
    • https://44dd6259-7513-41c7-b2f1-b2b1fc385d2e.filesusr.com/ugd/63022f_bd5f5c1e38364adf87a4e8412568b11e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3499f4bf-b91d-4a30-9b88-08050c5f7d18/xunojidogiborikusimego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75cae40-972e-4ccb-8804-ff7c575f69b7/59393501494.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/rebikurukifekaman.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/chutkule_shayari_image.pdfIn PDF document text
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_9063797ddc7f48a3be6888de6b9c6d8a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/33cb992e-7245-4526-bc4a-9f788cb0cdb2/taurus_pt111_millennium_pro_g2_trigger_pull.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5ea7b0-6ce7-4bae-b532-9921dd88b5ee/hp_probook_6550b_notebook_pc_specifications.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_37c0c67a9c01443297106eee5fde06a8.pdf?index=trueIn 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_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 5448 bytes
SHA-256: 492d2c17beb0c763176961c4b0cb36ec89f6df58a31b8f25c5f39a57c2bab19d
font_01_sfnt_off000140f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140F2 12300 bytes
SHA-256: 6c8e47a70e5ea8fc560134908fc8d344454a43d4a08a6e16f1562a8daef3b203

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