Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6fde73a5136502…

MALICIOUS

PDF

80.9 KB Created: 2021-04-26 12:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e395af317dad32292239801f4a3fd2e1 SHA-1: 5451556e927ca0a0051cf6587be039de4f2205e7 SHA-256: cd6fde73a51365028f7346ad3c7d4f5accb0b6190235cf8213f0f926f2aef00d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://midufefew.ru/strik?utm_term=john+deere+d140+bagger+attachment PDF link annotation
    • http://ppl-nutrshopfit.website/zekton_black_italic_font_freet5vu9.pdfIn PDF document text
    • https://nokesopupikes.weebly.com/uploads/1/3/4/7/134767934/depoviwigujuz-zisajazoperi-pewojusif-wovajepowofu.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/articles_worksheet_class_2.pdfIn PDF document text
    • http://tosasex.22web.org/43898963642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_603271f553549.pdfIn PDF document text
    • https://doguxugufini.weebly.com/uploads/1/3/0/7/130739878/zolofe.pdfIn PDF document text
    • http://rugenaxuw.iblogger.org/34660554743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472221/normal_5ff1d5f180072.pdfIn PDF document text
    • http://vkysnaya-eda.site/holt_african_american_historyi762i.pdfIn PDF document text
    • http://idealica-co.site/peak_scientific_nitrogen_generator_manualfjwgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_5fe622e13a373.pdfIn PDF document text
    • https://jojijuwewit.weebly.com/uploads/1/3/6/0/136057333/konejizejovanonixuku.pdfIn PDF document text
    • http://vipmanmarket.space/868732631107c28u.pdfIn PDF document text
    • https://pepexelizuruxu.weebly.com/uploads/1/3/4/6/134656498/dakobefadagixo_borozej_wosusuniwuwew_depub.pdfIn PDF document text
    • http://itdiscount.info/apc_back-ups_xs_1300va79spj.pdfIn PDF document text
    • http://vadozawemowo.iblogger.org/free_online_editor_add_pages.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
    • http://xavidopo.epizy.com/oklahoma_driver_license_renewal_real_id.pdfIn PDF document text
    • http://taputideletu.rf.gd/23802737895.pdfIn PDF document text
    • http://fugulimenar.rf.gd/toxij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebf4096-1500-4299-8d47-2c32baeff4d9/the_tibetan_yogas_of_dream_and_sleep_audiobook.pdfIn PDF document text
    • http://remigesej.epizy.com/firubobafefon.pdfIn PDF document text
    • http://zegisaxan.rf.gd/epf_withdrawal_form_non_aadhar.pdfIn PDF document text
    • http://kefujamulewim.epizy.com/oki_printer_mc362w_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c56ccf2-6341-453c-8830-ef582a63519b/how_much_does_architectural_engineer_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1a67b7-c4ed-47da-ad78-2c15c6ba0da5/the_argonauts_maggie_nelson_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e14d1c-3b77-437f-8b1f-0f97773be0a8/best_hadith_of_prophet_muhammad_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d670325-0e45-4988-9340-f61adb8554f4/web_app_development_for_dummies.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_off0000f146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF146 5296 bytes
SHA-256: f8aa934dec0da52c8fed4da7aa299e156a341117eb41f4fa79162eecca95e183
font_01_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 10748 bytes
SHA-256: 5319be05d43dcc04d004a2b260656d0201a8ad4ac0ea8c4ecd5935e43a22acc6
font_02_sfnt_off000127db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2