Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2257f2feeee1e5…

MALICIOUS

PDF

78.3 KB Created: 2021-03-31 12:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 229c50095587df789f6974807a8a3751 SHA-1: 6991ab471f58f9c2b43e7b64da624788432cb24f SHA-256: fe2257f2feeee1e56d7b730f5199bec8f5765873d4ff378f92aa727d810f06ab
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to selling watches, which is likely a pretext to drive users to the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/strik?utm_term=where+to+sell+my+invicta+watch PDF link annotation
    • http://storeeu.info/famutepeluwevenofepiqcx4.pdfIn PDF document text
    • http://gidomepijamasos.iblogger.org/73256953469.pdfIn PDF document text
    • http://wajobok.iblogger.org/how_to_answer_willingness_to_relocate.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/jejiahd/1944080749.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • https://cdn.sqhk.co/vikeguzag/jXhjjhe/xuneguredilunifamekobujik.pdfIn PDF document text
    • https://cdn.sqhk.co/kofatuziwu/ihjdgdk/ib_chemistry_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/iwWKZid/bonbon_cakery_mod_apk_2._1._14.pdfIn PDF document text
    • http://salonhq.xyz/gudewutararupevwlxcu.pdfIn PDF document text
    • https://cdn.sqhk.co/jomawutid/irCIifI/azaria_mckinnon_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/simixejazir/ihrbSbk/wordpress_admin_login_loop_redirect_problem.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/8vUYjiW/android_10_samsung_s8_plus_release_date.pdfIn PDF document text
    • http://hookup157.online/school_management_system_reportuheyh.pdfIn PDF document text
    • https://cdn.sqhk.co/tedubifo/idShLhh/novafugebenasa.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/SAKUghl/rhythmstar_music_adventure_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/JicQqC3/beautiful_couple_wallpapers_for_phones.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/hjL6jdw/jikezuwibexakumuwapojolaz.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/ghgghbV/subakugaxasavejixezofok.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/jcDOOKT/83244462146.pdfIn PDF document text
    • https://cdn.sqhk.co/gojinuma/gfVw6ji/earl_of_sandwich_las_vegas_nv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09601da-cd50-4fc9-af34-dd56b5f57ba6/jogeximanulab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8cd19f8-1d1a-448a-b15a-d80b4ec45e85/jekigipapeturewopob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2eed355-daad-4c16-b0d5-b50e9bbe96ce/how_to_buy_options_thinkorswim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e134c33-eb0d-49ab-9eec-dcb3eb8b57ba/how_long_do_i_need_to_charge_my_zagg_keyboard.pdfIn PDF document text
    • http://vagoposejexuma.epizy.com/suzuki_volume_1_violin.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_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 5308 bytes
SHA-256: 8107a1352e5bc4f3da0bcf6ce4941a9cd23788738d8f8fd4ce4e7d772d3735a0
font_01_sfnt_off000106b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B4 10852 bytes
SHA-256: 7bfb3588d6418634cfba3cac03d359bb81925967690af7e143a7ae29b0c90a34