Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0b5183c3ea22f3…

MALICIOUS

PDF

66.0 KB Created: 2021-03-08 10:45:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d93615ca65febe7d728d56ce5f3ee5af SHA-1: 5faf15bec01a329103a028589c9365971d1c4c6b SHA-256: 3f0b5183c3ea22f3505a71c3b5c1683999e86bfe4c353f75b0172b593450a8bc
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, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational materials, aiming to trick users into clicking the embedded 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://jacksth.ru/wix?keyword=ixl+algebra+1+u.2+answers PDF link annotation
    • https://cdn.sqhk.co/zugivakizo/fghQijO/bomber_jacket_with_fur_womens.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/85953282343.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/orjdsjc/wedding_cake_decorations_purple.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/UI4hije/amazon_fire_tv_mirroring_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/Qjd4gfJ/audio_cutter_and_joiner_software_online.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/ijajhDx/amazon_seller_customer_service_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/womilepeba/oAgh0id/dj_music_mixer_free_download_for_android.pdfIn PDF document text
    • http://216tilford.com/vodidome4ckub.pdfIn PDF document text
    • http://mugedly.xyz/75996211794afd8k.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/VjhKibi/super_mechs_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/g3icgjN/68826216689.pdfIn PDF document text
    • http://genusadnlo.space/mumufipovakezfy.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/zHgcTgf/city_driving_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/ge95idi/auto_reply_for_whatsapp_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxebiseso/jhiahcS/juxexibinafamagotagitope.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/tBojjhc/twisted_wonderland_manga_anthology.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/9448d863-1943-44d6-83d2-b136e12db529/99448742880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e133c0-e92f-489e-ae5a-9fe5ea13cee9/bodozefari.pdfIn PDF document text
    • http://zagofij.onlinewebshop.net/rotefezijajerovebodawuvaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7af980a3-c423-40bd-b9be-7baeae1f24d1/sumudovilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1778337e-f004-43e2-92b2-79441c0d04e7/77336855525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79fc9b30-ddf1-4da7-a397-09d52287e38f/vukuko.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_off0000c73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC73F 5304 bytes
SHA-256: 76407b480e397d6d1b7617fadf007dc470ad81283d34d78e6de8003c53c1c8cc
font_01_sfnt_off0000d97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97A 9840 bytes
SHA-256: 1b48c351f3c4967748c2a5a44c9506b9fce3eda7987a8fc094e99f1d5e57bf38

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