Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66f3eaadca27875…

MALICIOUS

PDF

68.7 KB Created: 2021-03-24 22:22:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 916905eb26b582b870b99fcf3087de88 SHA-1: f2e1341caee5802df8757092e4a77259793d805c SHA-256: e66f3eaadca27875ba75fb4d73322ff0c46d3547b4ba23832fd20b4f8797a8f9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to SEO-optimized domains designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded URLs suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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-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://seumenha.ru/wix?keyword=icivics+worksheet+p.2+answers+who+rules
    • http://presalle.xyz/29004498001eneqj.pdf
    • http://rulabepotinujeb.mypressonline.com/bpmn_tutorial_deutsch.pdf
    • http://www-sfr-fr-monespace.com/wexoxaxawuwuwikurkn2m2.pdf
    • https://jumedewumeba.weebly.com/uploads/1/3/4/3/134310957/0510c87e.pdf
    • http://lirifajo.sportsontheweb.net/10316412175.pdf
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/3727289.pdf
    • http://inter-kalinka.ru/previous_employment_verification_letter_template_wordrteml.pdf
    • http://itwomen.space/425584835744qrjk.pdf
    • http://pupezawat.scienceontheweb.net/puluso.pdf
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/83803069044df2c.pdf
    • https://firiwipavixura.weebly.com/uploads/1/3/1/4/131407767/76fddadc9fb0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://def05634-b969-4265-beeb-1e7d695e9a44.filesusr.com/ugd/6865ce_e4c1511eaea646528f7922ab6220a4c3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea856c51-474b-45f1-8a89-29f73041961c/2006_ford_f250_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/b626ca22-c12d-47e6-b6db-a223aea531db/37284152620.pdf
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_ed01049146ca4cb99e80447438ea2220.pdf?index=true
    • https://s3.amazonaws.com/nuselufuzo/find_my_stored_wifi_password_android.pdf
    • https://8458b573-1d6d-478c-912c-b10a972f31df.filesusr.com/ugd/150112_f4790eef8eb847c78866e69abca9d998.pdf?index=true
    • http://sajoveguduv.onlinewebshop.net/apartment_therapy_s_big_book_of_small_cool_spaces.pdf
    • https://s3.amazonaws.com/lupuvogotog/lavemonefifil.pdf
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_e471f129ab6347cd8ea2a617f5d1d584.pdf?index=true
    • http://lurolubudoruk.onlinewebshop.net/wibizisezisotonuvi.pdf
    • https://s3.amazonaws.com/nitatotol/bombay_tamil_movie_uyire_ringtones_free.pdf
    • https://uploads.strikinglycdn.com/files/410efc5b-d705-4770-8d9b-c3c54defb67d/foler.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/vowovoruvofalataletiwi.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cebe.bin
9ce8ce1ab23fee757ea70a2f6d5af1ca42a7e6a4c19d6901c6b16a2abec4ca82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBE 5340 bytes
font_01_sfnt_off0000e0ff.bin
aa3ee040b2e12fb24c4466f2b63fc7de336d2af6d6fa6eddbaf5569076caba0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 10660 bytes

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