Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f26e6289e34ff4d…

MALICIOUS

PDF

70.5 KB Created: 2021-04-04 09:55:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5db050cc80bc48ac44e0894559a99ace SHA-1: da0c470d68b7fd087469f1d7418d3d5a3f358f15 SHA-256: 2f26e6289e34ff4dff7c1040781fc76089962de9504c578440d96a073c50ccde
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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.
  • 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://bologen.ru/strik?utm_term=the+woman+in+the+window+release+date+reddit PDF link annotation
    • https://cdn.sqhk.co/pabukerofo/ihuAjjB/real_steel_2_trailer_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/mjimv0T/tenitukuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/jiXidjc/play_tennis_online.pdfIn PDF document text
    • http://kexopef.iblogger.org/wijal.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/WLHC649/download_stickman_basketball_2017_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/sipobufiw/qiahfhe/halloween_2020_cancelled_virginia.pdfIn PDF document text
    • https://cdn.sqhk.co/wixakulu/7ghDKAU/love_story_books_for_young_adults.pdfIn PDF document text
    • https://nusazipupuw.weebly.com/uploads/1/3/4/0/134042511/0e601b41.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/jufexidewogulupa.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/UNhejfc/gezedisafadoweveve.pdfIn PDF document text
    • https://runobutadafe.weebly.com/uploads/1/3/0/9/130969205/9493354.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/nemexixamizuboridizelosob.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/99880686774.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/gieljeh/lememoli.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/advanced_accounting_guerrero_solution_manual_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://reresolakogix.rf.gd/muvevijoba.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/wisedigomisawofofo.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/harry_potter_1st_book_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/23431414797.pdfIn PDF document text
    • http://zujetisapapido.rf.gd/why_does_my_old_kindle_not_connect_to_wifi.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/67620037878.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/samsung_tv_wont_turn_on_with_alexa.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/xudorojo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 5108 bytes
SHA-256: e5c0dbe60e6accba6fa14992edadf6673e947eec0ac7fa5005d4924dd9600c72
font_01_sfnt_off0000e5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FB 10728 bytes
SHA-256: e292a4a9da51697677e7df3ce8a444c3c4a679bec8c1922538e361ecb51b839d

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