Malicious PDF — malware analysis report

Static analysis result for SHA-256 566f97444dc6089b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-23 23:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0eeb30af33cbea5ea2f4bd2b15d799 SHA-1: a0253ef0e38d8f3433a9345659abf33be8ce9f87 SHA-256: 566f97444dc6089b395f70dcbc77b37bfcd089f6f64581db5a513f11609c252d
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that is likely part of a phishing campaign, disguised as a resignation letter template. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of multiple suspicious URLs suggests the document is designed to lead the user to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/123?utm_term=standard+resignation+letter+template+south+africa
    • http://nageramuvepom.mywebcommunity.org/learn_english_speaking_for_beginners_youtube.pdf
    • http://xexapitanegis.getenjoyment.net/blank_comic_book_template.pdf
    • http://gnfcns.info/espero_curarme_de_ti_significadogff8j.pdf
    • http://sravniproxy.info/libopepunikitekijuv4ut18.pdf
    • http://lawyer-consult.ru/stannah_stairlift_600_fault_codes2xt1h.pdf
    • http://sberpodarok2020.online/platform_based_business_models_examplesxocc3.pdf
    • http://zoneeuro.pro/programming_in_c_notes_for_bcapz1dw.pdf
    • http://blubadgehelp.net/mathematical_statistics_with_applications_solutions_chapter_21nnlz.pdf
    • http://pofaduxiruk.getenjoyment.net/master_of_the_universe_castle_grayskull.pdf
    • http://silewugebed.scienceontheweb.net/zexikisarabavetureg.pdf
    • http://scriptbook.xyz/zebra_zp_505_printer_driveru6s4i.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_e821f4a32de34902b53d54f5657807ad.pdf?index=true
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_349bb524fe4d4043ac9b9abe508aad68.pdf?index=true
    • https://7a6021ad-ea99-40b3-bafb-6570e045b460.filesusr.com/ugd/527ec5_4b00c75525ce4612a1efd7a153799893.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ffb10311-09ad-4854-8200-af87e5cb3484/how_to_make_a_scatter_plot_diagram_in_excel.pdf
    • https://uploads.strikinglycdn.com/files/1ec29d9f-1252-46c7-9467-2f47d96a8a07/craftsman_yts3000_manual.pdf
    • https://uploads.strikinglycdn.com/files/80945aef-80d7-46c1-a96d-5d025cc88694/66168244145.pdf
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_3023cd19b0d14a45be601a1ae9de1c99.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dec03a4b-844e-48b0-ad4b-a684e7974228/48375716467.pdf
    • http://radiviwix.onlinewebshop.net/12988174016.pdf
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_d0c2bea159e54312862544e1fba00c3b.pdf?index=true
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_c17bc2e293bc443db55315a71bb56a3b.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_off0000ead3.bin
d0f24155be0e52ecdd65a1f0035329f4d7794f6dbf38454f9a863a65448f71aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 5672 bytes
font_01_sfnt_off0000fdf2.bin
c06053fc00d73ade281fece29dd0ca665ef7a3ba0357184ab0f6558528499f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 10784 bytes

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