Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc50d76adc41300c…

MALICIOUS

PDF

68.7 KB Created: 2021-03-11 08:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c5417bc247a0081a8cd8c1d9b5d857ce SHA-1: 3287b2acae639d392d9b87dfa3e2a15474136316 SHA-256: cc50d76adc41300cb209d05d924f4c910907dcb53af7f1c4714edcf338ed02a9
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 high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to educational content to mask the malicious redirection.

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://leonvi.ru/wix?keyword=kinetic+potential+and+mechanical+energy+worksheet PDF link annotation
    • http://relibafogat.sportsontheweb.net/adobe_indesign_cc_classroom_in_a_book_2020_release.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/zKidif4/xmeye_download_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408002/normal_600e405fada26.pdfIn PDF document text
    • http://rexevivejegox.scienceontheweb.net/77478431734.pdfIn PDF document text
    • http://phtech.site/140176748663tadz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403407/normal_604395bc36a40.pdfIn PDF document text
    • http://cparta.moscow/bfme_patch_1._06g5bll.pdfIn PDF document text
    • http://reduslimitaly-official.site/723097867603ahzr.pdfIn PDF document text
    • https://cdn.sqhk.co/fafojipedul/73Wveih/bomubulanotar.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/how_to_eat_fried_worms_movie_rating.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/6296aa63-d0fd-47cf-bb4e-d1bb67cce1d5/rexotemuxujuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/literiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf37a4b-8516-4250-90da-301ac7719e83/beats_solo_wireless_headphones_one_side_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/gingerbread_house_template_tasty.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/architectural_design_conceptualization.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/dunkin_donuts_frozen_coffee_calories_medium.pdfIn PDF document text
    • http://bitines.myartsonline.com/bujirifixufokanaga.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/96314447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f20299-46e6-4623-8cf0-363ce611a325/dell_optiplex_gx620_sound_driver_download_windows_7.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_off0000cf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2C 5712 bytes
SHA-256: d98e62cd317bff4f47d0d7a70a7d42597b8d5c277401f3b890d04c3a7a6cc82d
font_01_sfnt_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 10112 bytes
SHA-256: ebfcea306153b85d92ec654763179b6d66372e97d38555b7819ae6f0b03f1f48

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