Malicious PDF — malware analysis report

Static analysis result for SHA-256 65553c7acda49511…

MALICIOUS

PDF

79.2 KB Created: 2021-02-26 06:49:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6285167196be292368d2f1ac9357145a SHA-1: d9a1dcf587b06b9aa7b6a51f6606d6a6c5383774 SHA-256: 65553c7acda495112288e286dfb9dfe892c1ddc8b5e71781987f57de6006136c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely using a spearphishing attachment vector.

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://leonvi.ru/wb?keyword=cfa%20level%201%20practice%20questions%20free PDF link annotation
    • http://50offstore.info/7036055061764i4r.pdfIn PDF document text
    • http://discount50it.pro/what_the_left_side_of_the_brain_controlsjsvy7.pdfIn PDF document text
    • https://guvepilafofifiv.weebly.com/uploads/1/3/4/6/134682232/pinuwuwaxidomip_gitadivokip_sixome.pdfIn PDF document text
    • http://libuwapuvewipev.mywebcommunity.org/88367449228.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/vowug.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/Rv7UXgi/download_xtrem_freestyle_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sezivalaw/Nha4jiC/major_mayhem_2_mod_apk_techylist.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/aYVmhhS/lelegavojemefevo.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/what_is_the_best_poem_of_jose_rizal.pdfIn PDF document text
    • http://motivawka.online/945660282204qih7.pdfIn PDF document text
    • http://idealicaufficiale.website/nail_salons_near_me_low_pricesvflpd.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/wordpress_admin_password_reset_phpmyadmin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/luramamelolem/making_a_budget_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/dibunizoxub.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/food_safety_net_services_phoenix_az.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/47149254443.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/84879566027.pdfIn PDF document text
    • http://giwetigimibe.epizy.com/muvexotexusad.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_off0000ea47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA47 5152 bytes
SHA-256: 233fffa2cf52144908f5a0e6fc263a970b5f86515817c3f0b103ce1bc4d1d59d
font_01_sfnt_off0000fbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF9 11112 bytes
SHA-256: 3fc84efea17614d46dabc6e26e8e1d12b2a078bce48b69ca21064520c80cf361
font_02_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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