Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7c111ec12a48ac…

MALICIOUS

PDF

124.4 KB Created: 2021-03-16 00:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0c6c857d96ea15023d7ec3dc66341613 SHA-1: 42a47a3c6cb9ad2f2920d6b181acbf7e6ca50883 SHA-256: 0e7c111ec12a48acc1ec0cb046f8715f87df31b57c224f544924d5bea19d5860
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to various websites. One prominent URL, 'https://dugedepap.ru/wix?keyword=when+is+jehovah+witness+holy+days+2019', appears to be a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wix?keyword=when+is+jehovah+witness+holy+days+2019 PDF link annotation
    • 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
    • https://s3.amazonaws.com/dufekifaral/75051712879.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_111ed5ab057142ce8b171a7377b7f9e1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e430e67e-1c48-4ce1-baf5-71906fac410e/how_to_find_scale_model.pdfIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_3b65b8af236b44f6a0bec590b124b1b3.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_b4080f3229e849e884f59c0978510e9a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a7f2a87-603e-4b5e-aacf-91fab5b117d4/how_to_trade_forex_effectively.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5fb5db-892d-40f4-87ed-d13e148e1698/bemozuveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b62a42-1d69-4ac3-ab7e-3ff43353fa9d/chinese_characters_boy_names.pdfIn PDF document text
    • https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_c9039a77782f424aa38d44ee29fcca3a.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_3e517de6b7d24d2cbf621d5eb94ff93b.pdf?index=trueIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_982b7a697f2441bab8f604cd493a3d27.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixolose/bu_jhansi_online_admission_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/archeage_ebonsong_6._0_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/how_cognitive_behavioural_therapy_works.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_5fb32f6c17d64fdab96135db7e83a80a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/62265696737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f1ff4f-8c11-442b-b455-227e8a6fa998/hp_battery_not_charging_windows_10_fix.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_013649e802d44e948cc5e0bac9c677cc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/bleacher_report_aaf_football_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd25aa2-4901-47e9-83bb-e659b0d5a98f/595783749.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/senior_executive_assistant_resume_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0663a756-cc10-40d7-bd2c-33bc797e3c46/dragons_fire_and_ice_2_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61afbf1f-3f27-4af4-bf66-5a9732946ad5/65268325322.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/f1_2019_calendar.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_off00019c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C59 5428 bytes
SHA-256: fbe7b97191f95c44730a40a6a6da5069256754d9ec77355d2318af91f1e13af5
font_01_sfnt_off0001aee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEE7 11428 bytes
SHA-256: 69c3b0a89779ac82680d9b95074315cc0deb8cb723e2dbffe5ba49aed831ded1
font_02_sfnt_off0001d5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5BC 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3