Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e54b761a7ec0b1…

MALICIOUS

PDF

98.8 KB Created: 2021-04-06 13:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b99fea0f3580c5453a5c8f891f5afb SHA-1: 7737f4da82defec4c5986204d5653b4364bbf144 SHA-256: f4e54b761a7ec0b11b9b2b91186697afcd5884039c0ca578c6032f35d7d32379
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF heuristics suggest it is designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • 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://jumiwimov.ru/wix?keyword=algebra+chapter+9+test+answers
    • http://wufujapebapu.22web.org/convertir_de_a_word_nitro.pdf
    • http://joweponula.mywebcommunity.org/billetes_de_dolar_para_imprimir.pdf
    • http://vurolak.iblogger.org/19032685258.pdf
    • https://rogefuza.weebly.com/uploads/1/3/4/6/134688393/2e32d2dc4fb.pdf
    • https://vemugalibi.weebly.com/uploads/1/3/4/4/134484787/vigexowurus.pdf
    • http://abwaab.su/tinaduzoruwomijutky8f.pdf
    • http://ig-objectionform.com/pitavazurasawimuwedhc2vj.pdf
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/ed6fe.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • https://tubozabuzimez.weebly.com/uploads/1/3/4/8/134878922/0b0e6.pdf
    • http://narawodosure.medianewsonline.com/biochemistry_practical_book_mbbs_download.pdf
    • http://bnl-jobs.com/orhan_pamuk_about_istanbulphyjd.pdf
    • http://fito4ka.xyz/58417917496f4yd9.pdf
    • https://datotizit.weebly.com/uploads/1/3/4/6/134696706/bopaxerekamor.pdf
    • http://elinekici.online/yamaha_30_hp_outboard_service_manualv3z6e.pdf
    • https://woninulanomawij.weebly.com/uploads/1/3/4/6/134670754/jiromodunalabeteb.pdf
    • https://buvaranugabenu.weebly.com/uploads/1/3/0/8/130873820/suzodozugixa-fisira-fikagapadu-furapafuzoxax.pdf
    • http://beststudent.space/94301973574l7a1p.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zomijoler.epizy.com/5e_weapons_magic_items.pdf
    • http://xoxuvenopojox.rf.gd/8046645138.pdf
    • http://jaxunukologefis.onlinewebshop.net/alpha_male_strategies_book_free_download.pdf
    • http://kaguwetu.epizy.com/operational_transconductance_amplifier_questions_and_answers.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f9d.bin
50365544415d26db096ae6f92e4e3f396699da0781f8b15245cdf70cf0b5240d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 3396 bytes
font_01_sfnt_off00012b3d.bin
2cf1e368e18a529f7c63ddec9d6437267c35ceee819e413f6fbde5bf032aae05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3D 5572 bytes
font_02_sfnt_off00013e37.bin
46540bcb5d292dd30b01f80f0f39fe6a56f3245d554097b513683cb29c59bb3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E37 11664 bytes
font_03_sfnt_off00016660.bin
84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16660 16060 bytes

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