Malicious PDF — malware analysis report

Static analysis result for SHA-256 a10f58306686ee02…

MALICIOUS

PDF

75.4 KB Created: 2021-03-23 12:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5744a4ae37b4df367832b5d2fd366a38 SHA-1: 54dae17bdcae2da49d5ee6765e6fa59b48ed46f6 SHA-256: a10f58306686ee0205242c495d643e7bc7f6815e7d29183ca0e9b95e543eac3e
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that directs users to a URL designed to appear as a search result, likely to trick them into downloading a malicious payload. No scripts were extracted, but the presence of external URIs and the ML/ClamAV detections strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=algebra+formulas+class+10+pdf+ssc PDF link annotation
    • https://cdn.sqhk.co/tukepola/gzQgd2K/talking_dog_tiktok_bunny.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/murunalesidimupasetidasa.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/fjiagfR/prank_caller_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_6048eba002e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_6035aca322cc8.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/24YrEih/jebufifow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fe6d2c2b10c8.pdfIn PDF document text
    • http://guparob.mywebcommunity.org/my_friend_dahmer_book_summary.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/ap_transco_notification_2020_syllabus.pdfIn PDF document text
    • http://rapiwanijisage.scienceontheweb.net/best_annotator_mac.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/lezerawe/bowling_score_sheet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/calendar_app_ios_und_android.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/divine_mercy_image_original.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/batman_games_for_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30af38c-22f4-4262-a1fa-d21b404a1b04/gogovote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ac8cb0-1849-402e-a7a1-d1ea8918ff53/nevorewunufazivaweje.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/lire_le_journal_ennahar_en.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/80496308026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05b318e8-04b4-4a03-a4bb-2c0eea152da4/wesedirixubelex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85a0b97-d209-4fe0-8965-ff4198595d51/harry_potter_y_las_reliquias_de_la_muerte_resumen_del_libro_de_rut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e9ea40-cb37-4fe0-b901-a4167345937d/how_to_install_evenflo_embrace_car_seat_base.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_off0000e6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FE 5796 bytes
SHA-256: d28a6009b17b33a91f5c6d10028686eeacb3f165c647a8ff93b6ca005f5afe01
font_01_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 11068 bytes
SHA-256: 2e64dce1231f9a75a238240c3915120e8b3ad9693d96f82ec0fe7aa942d2e03f

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