Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b210be2ddebcc7f…

MALICIOUS

PDF

72.2 KB Created: 2021-06-06 13:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f830977ee0457c8076302632dc78f4c SHA-1: 0ff8d01c0a269b2ae3c44b200ca24ac101961b3a SHA-256: 7b210be2ddebcc7f8ed3cb8048f54721764959c98c5316b96fb2bbc197bea821
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'philabc.ru', which is likely the primary lure. The document body, though heavily obfuscated, contains text related to smart bracelets, suggesting a social engineering pretext to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://philabc.ru/pbw?utm_term=smart+bracelet+your+health+steward+how+to+turn+on
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nugewil.pbworks.com/f/fifty_shades_of_grey_soundtrack_free_download_full_album.pdf
    • http://tiduxikuve.pbworks.com/w/file/fetch/144421671/shadow_fight_2_special_edition_hack_mod_apk_android_1.pdf
    • http://kedetuwi.pbworks.com/w/file/fetch/144413232/liwuwutukepobaserovu.pdf
    • http://kepojijudiva.pbworks.com/f/silabas_ejercicios_para_aprender_a_leer.pdf
    • https://uploads.strikinglycdn.com/files/499da5f3-4fea-424b-ab45-ef834f476b44/samsung_un60j6200af_stand_removal.pdf
    • https://uploads.strikinglycdn.com/files/de809d97-9e3e-4043-9839-2ec196c260d6/does_aarp_help_seniors.pdf
    • http://rugewenuzed.pbworks.com/f/riwumi.pdf
    • http://pajinap.pbworks.com/f/soul_knight_secrets.pdf
    • https://uploads.strikinglycdn.com/files/82a17f65-2fb7-4906-bcce-9b0963697b10/15020314293.pdf
    • https://uploads.strikinglycdn.com/files/a4af6e87-c40a-4f05-aea7-423c6d409491/90124734851.pdf
    • https://uploads.strikinglycdn.com/files/86d9fbb3-e305-418c-a78d-8fd73b7ff2bb/cortisone_shot_in_back_did_not_work.pdf
    • https://uploads.strikinglycdn.com/files/09a54dad-dbdf-434f-a512-b70c8e16dfcd/35286389372.pdf
    • http://wuwazilizos.pbworks.com/f/vuzuzolezurunomet.pdf
    • https://uploads.strikinglycdn.com/files/fe5b35bc-114a-4518-b148-8ed95f6add7a/kuguzepulibuburexajub.pdf
    • https://uploads.strikinglycdn.com/files/935766aa-c9b8-40ce-951a-8e432e538f06/94124405463.pdf
    • https://uploads.strikinglycdn.com/files/904cecdf-a49e-4708-9a82-6ac258687cb7/where_can_i_buy_an_armadillo_girdled_lizard.pdf
    • https://uploads.strikinglycdn.com/files/d8926173-3352-4315-a8b2-c701fd868f2f/euro_truck_simulator_2_trkiye_haritas_indir_youtube.pdf
    • https://uploads.strikinglycdn.com/files/a99c26b5-8dff-44f5-a1cf-a4278c3f074d/64499665562.pdf
    • https://uploads.strikinglycdn.com/files/f47d8080-a5a3-461d-b0d7-77c49d0ee7f3/toto_washlet_remote_troubleshooting.pdf
    • http://pijipusap.pbworks.com/w/file/fetch/144620163/diwerapitadodojobapofiju.pdf
    • https://uploads.strikinglycdn.com/files/be06baa0-09e6-42ec-b889-4b1d371f6f86/74270084410.pdf
    • https://uploads.strikinglycdn.com/files/3fc0cc8a-ca67-46aa-9515-7bfa31f41683/mefumosobetikeki.pdf
    • https://uploads.strikinglycdn.com/files/0ac04cd2-fc4a-46ce-981e-57183f84564e/libros_de_gramatica_ingles.pdf
    • https://uploads.strikinglycdn.com/files/b5f3523d-5539-4f13-aad7-22ffb42f07de/my_cloud_home_username_and_password.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_off0000db75.bin
5ea4d1b23cbd64fe505f0f0075c27835bc57035a3db4288071a28e6ff742c2b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 5616 bytes
font_01_sfnt_off0000ee6e.bin
aa826ff7607579f44d2214cf2de48bd5f6e1987c4ea85665f68e0de711363af2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 10724 bytes

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