Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16378cf2c7eb4dc…

MALICIOUS

PDF

74.3 KB Created: 2021-03-28 15:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 95c3aee8914f56d24345d997f2f77c60 SHA-1: 1d9ca600d373af112e4da006516a394eaceafe56 SHA-256: b16378cf2c7eb4dcf388808c721906b4ab1b35416ceefd5a2ca96af7215d9d01
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. The document body, though partially corrupted, suggests a lure related to 'probability questions for bank exams'. The primary IOC is the external URL found within the PDF, which is likely used for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=probability+questions+for+bank+exams+pdf PDF link annotation
    • https://cdn.sqhk.co/joxomawezu/TmjeFhi/gijidegek.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/42817324740.pdfIn PDF document text
    • https://cdn.sqhk.co/lefidotoxono/m2OXsxK/36367074928.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/AjaOhiT/87288607931.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/how_to_make_white_hair_look_younger.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/o5gfYI0/tekinagaxamiv.pdfIn PDF document text
    • http://wejesigozolireb.getenjoyment.net/quadratic_function_review_common_core_algebra_2_homework_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/hgjfEja/pdf_annotator_free_portable.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/zzTihib/devedozadopimawolamene.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/jekRnJl/tryhard_name_generator_fortnite.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd67718-3f2e-4ae7-80f5-7d4c780b2a66/botiwesosafowopafalov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2e2db1-b731-411a-9916-f32e0d4baea9/60481193824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de62b6d-e485-4487-9196-dfa700589bff/is_road_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ecf7f3-a3d3-4593-9285-390eefa9f079/tcp_ip_network_layer_protocols.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0257ffd9-3265-4d68-920c-b2c920434e84/sitinupegetanafikaz.pdfIn PDF document text
    • http://jelunegizubu.atwebpages.com/programa_aprendizajes_clave_tercer_grado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df6b7779-2769-4f4d-966d-b7d071678cda/can_you_bake_in_a_copper_chef_pan.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/calories_in_one_taco_bell_steak_quesadilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/651dd612-54d0-4b92-97fe-866d4cf6f927/sears_craftsman_shop_vac_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716cce87-da6f-42b0-bdd8-4d4f017794d6/stock_market_futures_after_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4094520c-08bf-4cbf-ae9e-832b0522e1b4/bimosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1108ada-e8c5-4de8-bc35-ac8d71de3367/how_much_is_samsung_galaxy_s9_in_nigeria.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_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5688 bytes
SHA-256: 040674e65843d0c916ad2d13da9a5ef0187e7a5081ce172d2a248f98bd4ce7e0
font_01_sfnt_off0000f7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AA 10616 bytes
SHA-256: 59437c971ca05d4179974562350bd2a8e2c6a41eb1b4ae1c148040368d6e7b03

Open this report in the interactive analyzer, or submit your own file for analysis.