Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc17af2ce1c4e6bc…

MALICIOUS

PDF

83.9 KB Created: 2021-04-19 08:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 46d87f8fa1fba55fe9b9615a83c4c988 SHA-1: daf9e8e240c22d53868a1a389460f418b332ea1c SHA-256: dc17af2ce1c4e6bc78567c39349b77229fbab99033b1132525a8cf7ccec423d3
186 Risk Score

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. 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 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://nipisod.ru/strik?utm_term=what+happens+if+you+lost+your+ebt+card PDF link annotation
    • https://cdn.sqhk.co/fowifabibu/gdifhew/21323898234.pdfIn PDF document text
    • http://sizoxuk.22web.org/diet_plan_to_lose_belly_fat.pdfIn PDF document text
    • https://cdn.sqhk.co/jategesil/cHHIhaR/one_clue_crossword_answers_nuts_and_bolts.pdfIn PDF document text
    • http://zosexurotatogek.iblogger.org/michelin_green_guide_france_map.pdfIn PDF document text
    • https://cdn.sqhk.co/koxopumo/yU2hahg/extraccion_de_aceite_de_palma_africana.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/4EYjcSz/juzerapuzevinikezul.pdfIn PDF document text
    • https://cdn.sqhk.co/nujidegowupi/hu1ZXgf/92639019979.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
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_af68ef6967d9439ea77cd9eea671ea3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/sole_e25_elliptical_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585d42b0-2a8e-47ae-b091-314a84096b93/optiplex_780_video_driver_windows_7.pdfIn PDF document text
    • http://mutidulofof.epizy.com/google_docs_templates_free_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/guided_horseback_riding_tours_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37fea2a-4a56-4737-823f-52d293ea6ff7/clicker_klik1u_universal_2-button_garage_door_opener_remote_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e78d148-c734-405a-ae02-f9870a4c31b2/yaesu_857d_service_menu.pdfIn PDF document text
    • http://xorirefojexo.rf.gd/37575568235.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_70535514190640d187eea8cbf009a3bf.pdf?index=trueIn PDF document text
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_75c97c969ee940f896de735e24feb80d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4250114d-7f6e-457f-8490-d204f250f622/cuales_son_los_fundamentos_defensivos_del_voleibol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917da48c-34a9-491f-8323-c652c49bd65d/barnett_vortex_youth_compound_bow_left_handed.pdfIn PDF document text
    • http://modunatotuw.epizy.com/percentage_increase_decrease_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/96767030426.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c902c523-80f6-4b90-9fa8-fb0f8fec0177/que_es_un_taller_online.pdfIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_776e7c3c6e844ec2a9abefe26b309ab5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5bdbe9-e3ab-448a-8b05-c507f6f9cdb3/85980242429.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_ef2c0fb4e5e6491d9b7b0fb52f59fb0c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/efecff05-9b24-4f46-842c-6ac6d479fd87/wegokolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6961188d-75f0-4ac2-96d2-b0bbc957fbb5/dirojux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7dd8c17-a780-48e4-87b8-05b017fe42ea/39785520099.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_off0000fc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC94 5380 bytes
SHA-256: 6d9b81a98f3176e19891edee6e8be1ab806e12dc6a0e770b49f55a55f38589ed
font_01_sfnt_off00010ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED4 10652 bytes
SHA-256: 5f38c3ec70d28564b9058994d9ca284fa134fafaadd79cba1b6e4750262ec5b0
font_02_sfnt_off0001331d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1331D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34