Malicious PDF — malware analysis report

Static analysis result for SHA-256 43246de24285ebe6…

MALICIOUS

PDF

77.7 KB Created: 2021-05-09 19:12:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5885142a9417a214ea400e1ff15d5a72 SHA-1: e76f9d1c7ae17faba82ee0f20b15f53ea8090013 SHA-256: 43246de24285ebe6843310861f5a2af88d9563415e1864f08c1d350bfd775e97
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though partially corrupted, suggests a lure related to a common health question, aiming to trick users into clicking the malicious link.

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://dafemum.ru/strik?utm_term=how+can+you+tell+if+pink+eye+is+viral+or+bacterial
    • http://cardioactiveufficiale.site/86775336935f8ifs.pdf
    • http://gelufose.scienceontheweb.net/socrates_philosophy.pdf
    • http://wokodanib.getenjoyment.net/misotavujoletomes.pdf
    • http://dhl-order.info/35234679898pkbo.pdf
    • http://wownatural.fun/664717918632l77m.pdf
    • http://vojemodipu.sportsontheweb.net/garmin_2689lmt_battery.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0bc32a10-21c4-4785-8691-102896a4283a/what_age_can_you_get_your_license_in_maryland.pdf
    • https://uploads.strikinglycdn.com/files/699510ae-c1a1-47a9-b0fb-0e00d979cd3f/ubuntu_14.04_free_download_32_bit_iso.pdf
    • https://uploads.strikinglycdn.com/files/c7758868-747d-431c-a862-183941467a9c/vepurejigizebemonigolo.pdf
    • https://uploads.strikinglycdn.com/files/dc4913f6-ad30-4c56-84d1-db9b9226d8f4/what_is_planning_model_marketing.pdf
    • https://uploads.strikinglycdn.com/files/fe523661-3047-4e58-a543-04c946b07d80/how_to_install_google_play_on_kindle_fire_3rd_generation.pdf
    • http://temipaz.epizy.com/android_watch_apps.pdf
    • https://uploads.strikinglycdn.com/files/6d96fb36-3aa6-412a-95eb-1b4a3d70d2c3/oster_pro_1200_watts_blender_review.pdf
    • https://uploads.strikinglycdn.com/files/e6f006f0-9de2-4bf9-8071-9f149f2d60cc/voxubukul.pdf
    • https://uploads.strikinglycdn.com/files/28551d3e-f99f-4b50-8f8d-c0091d7a8098/health_and_safety_course_in_uk.pdf
    • http://ranesewigiz.epizy.com/vemusuduxavuwos.pdf
    • https://uploads.strikinglycdn.com/files/15e1b6c1-7ddf-41be-a8ad-050c329d37ec/zuzugizotejuzoxut.pdf
    • http://bajejefi.epizy.com/63544509673.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f21a.bin
589a8d99e55a62f8ed5ab42f14c4baa2c8fedbc0d2cf7aea7f7ab4103ec85d90
pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 5428 bytes
font_01_sfnt_off000104bf.bin
c2b5bd587929b452d243ab1eab055bde8e69d9d887fac16a58985564a6a325de
pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 10964 bytes