Malicious PDF — malware analysis report

Static analysis result for SHA-256 a227ad38988e8703…

MALICIOUS

PDF

77.4 KB Created: 2021-03-21 06:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fcf271c07cf0d1b1d2337095d1da19a1 SHA-1: 9a6e6c8f2a7a03b523471a2bee1227a70d7241a5 SHA-256: a227ad38988e87035c8f2a04bb95e836f4f5912cee31e8f94c2001f6d982b425
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 0.9991

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/strik?utm_term=playstation+4+gold+wireless+headset+mic+not+working PDF link annotation
    • http://kaxasujigunabew.iblogger.org/screen_brightness_control_app_free.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/basketball_history_and_rules.pdfIn PDF document text
    • http://disojunis.iblogger.org/biwexopidudutagisomuxi.pdfIn PDF document text
    • http://nelitip.22web.org/26042569121.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bojafazes/armour_of_god_movie_dual_audio.pdfIn PDF document text
    • http://sibazod.epizy.com/88017219489.pdfIn PDF document text
    • http://kopolug.myartsonline.com/borg_warner_velvet_drive_identification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ade0b6-d884-4ba9-a2ff-55c66bcabd8b/53019587448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5010482b-2185-4669-91c7-6f119da96fc8/how_do_frogs_hop.pdfIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/samsung_refrigerator_rf268abrs_bottom_ice_maker_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/18460554037.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/uk_abridged_accounts_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d32a1c-e95c-4c58-a803-bf366e29491e/can_i_send_usps_certified_mail_from_home.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aad8ac1-8a99-4abc-8ea3-a2bf99d48f25/28572262171.pdfIn PDF document text
    • http://wenares.myartsonline.com/3458593405.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/83951263782.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/traxxas_stampede_2wd_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41907c7f-0fcd-4fd7-963a-567e1c8641f1/manabadapekijok.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/father_s_day_card_template_microsoft_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66464572-1cf2-4a7a-9b75-40508a88f565/simplifying_trigonometric_identities_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ee7248-11bf-4d85-ad25-507816d33d90/trimble_business_center_download_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257cc151-a3b1-46f2-b097-043b6261b5a9/naval_correspondence_manual_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7c0cdf-4e9d-4c8a-8e2e-f5f65fd865c6/43665585473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841c841b-eb1f-4f61-9ef2-11e3afa6025b/47860224811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fb622c-1cc9-4811-9391-f27425c8e674/14183846405.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_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 5700 bytes
SHA-256: c767d63ad1fd8f60cbc895b94c13f67e21ded767aea8d9ce66e72165a7bccea6
font_01_sfnt_off00010257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10257 10892 bytes
SHA-256: 2e75427025dc9b956fde24eb312b83879b401189df144223578c7cc31887ecee