Malicious PDF — malware analysis report

Static analysis result for SHA-256 5847e0d12185ba1d…

MALICIOUS

PDF

79.9 KB Created: 2021-03-12 03:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 381de2ca10347bf863faee5d3a23440e SHA-1: 18823613b285e53a53832f950ebdff44de9ca446 SHA-256: 5847e0d12185ba1d72fc8dd2868213d68e74a6522f2d4d8bf872fbb7bb9ca0a0
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL identified is https://maypoin.ru/award?keyword=bambusa+tulda+pdf, which is likely used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/award?keyword=bambusa+tulda+pdf
    • https://cdn.sqhk.co/vanewano/7qgcIHy/76127930928.pdf
    • https://cdn.sqhk.co/gigemuji/jdiegi6/idle_car_hack_game_download.pdf
    • https://cdn.sqhk.co/kowazodonaf/ihjghjF/popuxufexirige.pdf
    • https://cdn.sqhk.co/ketifoseja/hebgggA/wepelipipiko.pdf
    • http://select-get.top/pursuit_of_happiness_mp3_download_frgwddb.pdf
    • https://cdn.sqhk.co/nizaveni/jgjhdjh/ruvejababem.pdf
    • https://cdn.sqhk.co/lukulobu/0iazhbQ/sword_art_online_alicization_mod_minecraft.pdf
    • http://luminar3-download.xyz/vazudorejmap12.pdf
    • https://cdn.sqhk.co/javukapegami/iHNMPij/home_design_3d_free_download_for_windows_10.pdf
    • https://cdn.sqhk.co/fugovigul/hwpj3ll/65274658606.pdf
    • http://reduslimitalia-official.website/34860757185652ax.pdf
    • https://cdn.sqhk.co/xataruzepape/Sgg1hgW/xonikalixajeb.pdf
    • http://italiabeach.space/90410497141tlbnv.pdf
    • https://cdn.sqhk.co/xosuridasago/zzjjMN4/gawobolixutepezupovulesi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_8f0ec2d84a134facb86a159e92458bc8.pdf?index=true
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_9d54976a0b7e49e3851a9c29b151ec11.pdf?index=true
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_5cd2bf64ac5d429d9e3352fdbe549d73.pdf?index=true
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_e5d022e2841343e18381eb5cef94db1d.pdf?index=true
    • https://f33eab34-52c4-4f1b-91c9-7c5ec1255b8f.filesusr.com/ugd/9d0374_c3d219a01533443baaa43ec3cec899ba.pdf?index=true
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_150d85a4b346425695bbc47c8da7dab3.pdf?index=true
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_72d9ea8f371345568ee1176e9fcee0ae.pdf?index=true
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_1d18a2eb77dc40dfb83a77ebc901738c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f113.bin
1925f358ffd4be13e1ff73f1c0dafd3873ed798dab2595d7c940771fe7f91fca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 3352 bytes
font_01_sfnt_off0000fd02.bin
61e2a1774b9213415912d4695811a7b6a6e9a9cc5fed041da62e7bd2624b2c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 5280 bytes
font_02_sfnt_off00010edf.bin
b6bad60696342f8fa531e69afa18eca0242fc798a20e682162d47521db50d544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDF 10264 bytes

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