Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3afb9b7b9029eca…

MALICIOUS

PDF

71.4 KB Created: 2021-04-28 10:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 474ba744c1cbeac12d5f5213d4e40862 SHA-1: 70bcf65cab4946ed9fabccbaff68c826be38710b SHA-256: a3afb9b7b9029eca61688df3f7fb28204895a48561c111bd18b46a8a312bbe14
96 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 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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=how+to+replace+honeywell+thermostat PDF link annotation
    • https://cdn.sqhk.co/nisugavu/gfKc9iL/carrageenan_safe_in_toothpaste.pdfIn PDF document text
    • https://cdn.sqhk.co/juxajomuz/4Gidgjq/rusurewe.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/dhcLqgc/only_ones_who_know_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/zazifutunoj/ijhgii8/65255410773.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/ibNDggT/pac_learning_example.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/8jh5igp/basketball_hoop_base_repair.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/aWIsjL8/treasure_hunter_games_free_online.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/rufonali/45243779306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c9dd56-c012-4335-b111-38692785502a/94249860636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924a2c96-ffa7-417a-a1be-557baeedff6a/ch4__2o2_co2__2h2o__energy.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/arduino_project_book_spaceship_interface_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41017d2-8dfa-4dbf-9e81-4caa1ade849c/oreck_xl_belt_replacement_equivalent.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/police_report_number_wa.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/extreme_ownership_how_navy_seals_lead_and_win.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/jejop.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/administracion_segura_de_medicamentos_enfermeria.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/property_and_casualty_insurance_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/90489109175.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/30727744287.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/video_er_android_2019.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_off0000dc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7E 5328 bytes
SHA-256: 10a45dc5798f6ead692f926f833b634bcd156b23bc895e9911f094afd0f53807
font_01_sfnt_off0000ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE83 9808 bytes
SHA-256: 23e17a54dc96f075c64b2557670f0b31f3d87ddfb4f7d4454e5be36b3cf0ff46