Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb84b17e8e6af193…

MALICIOUS

PDF

572.2 KB Created: 2021-04-06 08:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f629471d7ad0958d156fb9fc7f0223e SHA-1: e2d561c9e9e94323106bc682982e53484c50bdd2 SHA-256: bb84b17e8e6af1930ec3544673d4a329d40980c127af0108171c1b04c4fa4300
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8285

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=performance+equations+chapter+of+the+pi+server+applications+user+guide PDF link annotation
    • http://themarkuzmusic.com/little_fires_everywhere_going_to_have_a_season_24heze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_603d271109ddc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476421/normal_5ffb2dbf34ccc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475728/normal_6016c3abd6df9.pdfIn PDF document text
    • http://oneitshop.pro/xisokugx0nig.pdfIn PDF document text
    • http://trynutra.shop/speed_queen_washer_not_cleaning_clothese1xbp.pdfIn PDF document text
    • http://all-host.site/101012099722jq8s.pdfIn PDF document text
    • http://zupebupinumupo.iblogger.org/model_3_for_sale_las_vegas.pdfIn PDF document text
    • http://pokupka.space/dobyns_fury_rod_guides88vna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412902/normal_5fc6485b4b2e4.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/sazariwapa/what_is_a_visual_learner_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0ee4f5-bf54-434b-9566-06d67054e8aa/votedupexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871627b1-ecf8-4369-aa7f-a3207a238f09/57376770577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09af53c-6a72-4721-8a6b-f46aaf750a31/62065384121.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/how_to_make_a_normal_map_in_maya.pdfIn PDF document text
    • http://rufuxikokuka.rf.gd/nuwukulusavaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632c298b-4767-4f9a-83c4-1a1d008ddb11/speak_by_laurie_halse_anderson_online_book.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/idt_audio_driver_windows_10_dell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbd138c9-032b-40ec-aab3-d1793a3ed93b/how_often_does_a_mini_cooper_need_servicing.pdfIn PDF document text
    • http://matogojetize.rf.gd/aeonium_tabuliforme_leaf_propagation.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/how_to_install_wireless_n_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e72c43f-4efd-4f88-b5ce-34b7dd2d05ae/9158734797.pdfIn PDF document text
    • http://gefifeji.rf.gd/what_is_the_environment_in_china.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_off00089b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B67 5756 bytes
SHA-256: ac261a6dd140e60dc587b82f18636987b93dce40ef26894f990ee0e698c94099
font_01_sfnt_off0008aed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AED0 14000 bytes
SHA-256: dee31ff15d52f64f6651b422d347c60218c19ccb72136937ef5b8adfc9a45cc3

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