Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc2664d908552f1a…

MALICIOUS

PDF

88.6 KB Created: 2021-03-13 16:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fef739483d98787cd4c2f39d62377ff0 SHA-1: bca4dfec0d53b6e2dd3b6b64475bef4cee8b80d0 SHA-256: fc2664d908552f1af3438310ee94f35cbcedccadcbf8bfb1c1e033f5193c2647
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one, https://kuzutuzo.ru/123?utm_term=album+song+tamil+whatsapp+status+video, being flagged as suspicious and likely serving as a lure to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/123?utm_term=album+song+tamil+whatsapp+status+video PDF link annotation
    • http://zojifuto.iblogger.org/chronicles_of_narnia_prince_caspian_movie_2.pdfIn PDF document text
    • http://berkeciftci.net/800_words_up_tv_2020a52w2.pdfIn PDF document text
    • http://luminar2-download.xyz/dawes_roll_with_the_punches_lyricsox9p3.pdfIn PDF document text
    • http://good-production17.site/93862746122z8a6w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fd666267e97d.pdfIn PDF document text
    • https://cdn.sqhk.co/lijusute/gdgiigg/42827864665.pdfIn PDF document text
    • http://temppicture.xyz/how_to_program_clicker_garage_openeraddle.pdfIn PDF document text
    • https://cdn.sqhk.co/forinabam/gf39muc/85606581295.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/sTgjggI/technology_teacher_jobs_rochester_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/hjdTia2/ps_plus_monthly_games_november_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/ieUnSii/xatisobovuwotufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414687/normal_600a5fa218332.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/eMBvB0T/design_it_girl_fashion_salon_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff682ebd0684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403410/normal_5fe2760727ec5.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/hiohbii/pebitujanapekijanupadat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vabelel.epizy.com/61903662211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf44d9f-cc7a-4eec-88e0-cea4852695b6/black_guy_haircuts_with_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e89b17b-4ad4-430f-964f-6f2713f83f90/pofofumix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98361721-959f-4933-a5f9-8b949242757d/8474885866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91128fcc-16de-412d-afbe-93ffac321996/fitbit_charge_hr_reset_after_update.pdfIn PDF document text
    • http://pejefovad.epizy.com/68031465110.pdfIn PDF document text
    • http://lanobifojedepa.epizy.com/ioannis_tomkos_athens_information_technology.pdfIn PDF document text
    • http://latowetutut.epizy.com/kindle_users_guide_10th_edition.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
    • https://youtu.be/pEq1xbCLOZk����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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69D 5556 bytes
SHA-256: b91f7391f93ad659a42f0f811241cf1ceda146d260be502a76ebd89eb890967f
font_01_sfnt_off00010962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10962 3792 bytes
SHA-256: 252c91062d55dc28b09921fc9e51ded012bb44df0c535aeb858547290e4f5c46
font_02_sfnt_off00011827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 10156 bytes
SHA-256: 155a2664785c0519e755536d39365954a00e9f88b16a9d3cc77cd14bae86c300
font_03_sfnt_off00013b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B0F 16680 bytes
SHA-256: e9b7af1ad62acaaab92cec0e6d625f3d3e989c806fe45f8dd9dfb34cf703346d