Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfc3e8282bafd10…

MALICIOUS

PDF

73.2 KB Created: 2021-03-29 14:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5fca676ed73dba1b5c051d955da1bc90 SHA-1: c8f07231765fe173a330da6b753a2dd88b6b5fce SHA-256: 0cfc3e8282bafd1006cd7cdb5e48999e9a29cda6301c25f31da587951f5e13b8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or distribute further malware. The document body, though heavily obfuscated, contains text that appears to be a lure related to an award, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/award?keyword=arretez+de+vous+tromper+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450037/normal_60018792abf85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_604cbd8fd98ff.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/nursery_rhymes_lyrics_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5fdfba1de548c.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/d_d_5e_spell_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461751/normal_604493c17926d.pdfIn PDF document text
    • http://noxetoporobosek.sportsontheweb.net/nalini_singh_archangel_s_war_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383571/normal_5fc9789a91e19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/booing_instructions_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce39583b-f06d-4961-acf1-c633dd837bd8/fugozar.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/black_plain_hd_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/bubujukul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41e366be-c47e-4331-82b2-2a1a417abdaf/bissell_proheat_2x_revolution_pet_pro_19862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7a56e2-e812-4bda-9a44-b42a2c57bf3c/12358669995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbacb97-d764-41e1-b98b-caba8402a6df/define_contract_law_in_simple_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3761ddaa-ae7c-4c2e-ab6c-afa63b008db3/midland_75-822_range.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34fa0bec-5a91-4aa5-8e6c-7c0e00bd57ff/how_to_adjust_carburetor_ryobi_trimmer.pdfIn PDF document text
    • http://fidikaxano.myartsonline.com/response_essay_introduction_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45256a10-4c12-444b-a982-5e7032d4d901/tujijurelipikagako.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 5044 bytes
SHA-256: 29fef2559b91e79e2bbd73fda73ea94d48b7d58fc492d27943b41cda0c2e33a2
font_01_sfnt_off0000e643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE643 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 12568 bytes
SHA-256: 08dbfb50937a0b490c9acee8a654417aa353802fe45aa65cb1d4936b18b8bbdb

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