Malicious PDF — malware analysis report

Static analysis result for SHA-256 744e4a73fb50725d…

MALICIOUS

PDF

78.2 KB Created: 2021-04-03 10:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 215d779c46c26a00da98b5c8111a7599 SHA-1: 9a4370dbcd42fcf19ee9f5cbde58a64c7d1e2172 SHA-256: 744e4a73fb50725dadb5a94e48cd7b9b7074212607efc863b1ecb70c9119e967
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'Canon eos 600d user manual pdf', suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=canon+eos+600d+user+manual+pdf In PDF document text
    • https://cdn.sqhk.co/sarunasol/gcMijFF/oklahoma_natural_gas_customer_service_oklahoma_city.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/icmtgdt/5015014337.pdfIn PDF document text
    • http://kalukawuwo.mygamesonline.org/eitim_bir_sen_aday_retmenler_iin_snava_hazrlk_kitab.pdfIn PDF document text
    • https://cdn.sqhk.co/kogeledewafo/fhgfgdX/lagopum.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/8ji4jh2/devewuxoxat.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/Uhe5ibc/57928995370.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/p9hfhgn/std_10_gujarati_medium_science_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/IjegjnQ/ice_cream_places_open_now_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/rxuggji/free_followers_and_likes_on_instagram_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/XicgM8o/46818471462.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/u4jhMib/ninjago_masters_of_spinjitzu_video_game.pdfIn PDF document text
    • http://bivaxosufuxibo.mygamesonline.org/dabobujitolosifa.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/hehhNhf/d_day_historical_significance.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/aacd2c46-f597-4da2-acb1-91a676c52d12/occupational_health_and_safety_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df9aee2-32d7-4188-955c-f016a4e4534e/wovidob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602efd7c-f4b2-4ef0-a3b3-ea2fd4aeff0a/vovutos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c846c5df-9c97-45c9-a9dc-6594badef3fe/how_to_download_apps_on_sky_q_mini_box.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_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 5388 bytes
SHA-256: 5eb96f250d3149e9e0292f41d415d5e357f61e6cc74b3816a577980e02230656
font_01_sfnt_off0001051e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051E 11516 bytes
SHA-256: 492e6c9a63156396ff65f36f8d3690a816aa50559d23321198a0a99eb26a337d

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