Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8fea73643960e1…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 02:52:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3822e203c63b363099696571cd2327d7 SHA-1: f4860918de77376ee2f0c5e5c58ea677b843c6e7 SHA-256: 4c8fea73643960e1a31992b46ad97fcd8b54a1c243afdac68436d0cdf16b3861
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, likely as part of a spearphishing campaign.

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://golowaki.ru/award?keyword=low+back+pain+exercises+pdf+arthritis+uk
    • http://itawegan.space/fetemapefiruketoxufoxafufrfqz0.pdf
    • http://reduslimitalia.website/200372570856kiov.pdf
    • http://kleomaften.online/wigukanegelixolukusugw684b.pdf
    • http://complect-tech.ru/lapovilejwo0u6.pdf
    • http://0fruits.space/cuneiform_stress_fracture_managementusn1a.pdf
    • http://muzhskoizhurnal.ru/roblox_cops_and_robbersforos.pdf
    • http://meinekarten.best/what_is_ul_approved_wood_stover4rgc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c4fca8c4-0f54-45c3-ae88-320069d86c16.filesusr.com/ugd/ac0d21_ef8f12c19c2e4d2da483efb3cd36272c.pdf?index=true
    • http://popeladidet.epizy.com/xunomodenadovofan.pdf
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_e2d304ed7727429d8093071a315f8532.pdf?index=true
    • http://sexuduwivaz.rf.gd/gobunanerakiwupapiwevurir.pdf
    • http://zewalevedesibab.epizy.com/how_to_make_healthy_salad_dressing_for_weight_loss.pdf
    • http://zovameden.rf.gd/best_movie_maker_app_for_android_phone.pdf
    • https://uploads.strikinglycdn.com/files/c071ef7f-6d86-49a6-8a79-574a51aa705b/wifabororuv.pdf
    • http://wemiwapava.epizy.com/yamaha_rx-v379_firmware_update_download.pdf
    • https://uploads.strikinglycdn.com/files/313c2dac-bf58-44bd-850d-9ef42ac768a4/best_close_air_support_plane.pdf
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_76544ab3cb7d4f698b2c51501e4471f3.pdf?index=true
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_e4c023ec605b4e86ba67c4b6766fd960.pdf?index=true
    • http://pepajefosub.epizy.com/hunter_s_prayer_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/4e391626-dede-499e-9471-e50dbee14ba6/actiontec_mi424wr_rev_f_bridge_mode.pdf
    • http://bomigezi.epizy.com/91260168278.pdf
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_1ed689945d364c3599c38a286ac5ac38.pdf?index=true
    • 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_off0000fecc.bin
51173f8dcbd42e5ab9575941bbc93247add8a93bb651de837643f2a29eb88d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 5516 bytes
font_01_sfnt_off000111a0.bin
5dcb38e705f39514d0629be8b6f53012604e82975e93177059ed409055af8428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 10468 bytes

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