Malicious PDF — malware analysis report

Static analysis result for SHA-256 9228c35719ec2d03…

MALICIOUS

PDF

89.4 KB Created: 2021-03-19 21:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 82a23a629723de5bc1ebfdb0d55b996a SHA-1: 157d5f7f18ef0018e03eb0166f35c1717418cca9 SHA-256: 9228c35719ec2d03d2f049fd2d2ba53aa013b5c698f743cd64bdce53ce6f2261
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 0.9989

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://lozipotod.ru/award?keyword=examen+toefl+contestado+pdf PDF link annotation
    • http://kowojolajamuv.getenjoyment.net/2008_jeep_grand_cherokee_tire_torque_specs.pdfIn PDF document text
    • http://mefizilexofe.66ghz.com/backup_whatsapp_data_from_android_to_iphone.pdfIn PDF document text
    • http://narovomesizi.medianewsonline.com/probability_word_problems_worksheet_with_answers_grade_6.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/73248362211.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/extended_family_definition_sociology.pdfIn PDF document text
    • http://burivuvuju.medianewsonline.com/geronimo_stilton_kingdom_of_fantasy_13.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/unix_shell_programming_tutorials_point.pdfIn PDF document text
    • http://bumefivaloso.scienceontheweb.net/lease_agreement_letter_format.pdfIn PDF document text
    • http://xagekofa.iblogger.org/canciones_infantiles_en_ingles_letra.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://jokipuzovorije.epizy.com/nicomachean_ethics_book_viii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ebb161b-0ee9-4097-a944-c18a66f62fb1/habits_of_mind_posters_free_printable.pdfIn PDF document text
    • http://wapuzega.rf.gd/98702431705.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/gosodedajamoxezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba47f6b-57ff-4f18-98e2-a413557c29ef/the_standard_insurance_ratings.pdfIn PDF document text
    • http://xutulatovemi.epizy.com/gawifufabiguwodixozivew.pdfIn PDF document text
    • http://rasijubesu.epizy.com/full_hd_background_wallpaper_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff999e15-ec56-41a8-bf9b-ba02bd446a33/how_much_does_tracker_cost_per_month.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5790cf27-fd20-4513-8c00-98e75dd861db/does_allegiant_give_military_free_bags.pdfIn PDF document text
    • http://tijejawoporufil.epizy.com/hdfc_ergo_motor_vehicle_insurance_claim_form.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/private_trust_deed_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87057ce-9fbf-4d0c-a1c9-17f16f96be08/navien_hot_water_boiler_reviews.pdfIn PDF document text
    • http://modewomidoxiva.epizy.com/ximedujigivular.pdfIn PDF document text
    • http://gonatiw.rf.gd/ragurowegejipeloxita.pdfIn PDF document text
    • http://robinovedibepo.epizy.com/dominican_republic_travel_information_guide.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/subordinating_conjunctions_song_itsy_bitsy_spider.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_off000110cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CC 4972 bytes
SHA-256: befab1daa50493d8fb914c349352e7e59bf3983ac37abfc38a65127cbdad6da1
font_01_sfnt_off000121a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A5 11980 bytes
SHA-256: 9e2246abe5e1f82c2989780b51b76fd1d77e54cd0c36a8d20af9f040093231e9
font_02_sfnt_off00014870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14870 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34