Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5fcf5b520acbd3…

MALICIOUS

PDF

75.7 KB Created: 2021-05-09 14:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1342d0689f37bd9eb7688cc18f10a887 SHA-1: e893b8347bb88ab9020bd14beb5ac63ed22be73e SHA-256: de5fcf5b520acbd36bc05fad83a44807d0e6d6ee052d5553681b4876c5683989
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics, including ML classification and ClamAV detection. It contains an embedded URL that directs users to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to deliver a phishing lure, likely through a spearphishing attachment.

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://dafemum.ru/strik?utm_term=babok+guide+v3+pdf
    • http://tapagigozi.medianewsonline.com/tenodafepolivunopor.pdf
    • http://vifezitenof.getenjoyment.net/52930140195.pdf
    • https://static.s123-cdn-static.com/uploads/4382780/normal_5ffa2e2d5abd9.pdf
    • http://pedumerik.sportsontheweb.net/ca_dmv_driving_handbook.pdf
    • http://budokudepa.scienceontheweb.net/who_makes_diehard_gold_batteries.pdf
    • http://kozidozilujivox.getenjoyment.net/4261098217.pdf
    • https://semogabetik.weebly.com/uploads/1/3/1/4/131482882/57c02f95179c4.pdf
    • https://cdn-cms.f-static.net/uploads/4481400/normal_5fe703561a7a9.pdf
    • https://xagogijan.weebly.com/uploads/1/3/4/7/134720006/tinizaparivuve.pdf
    • http://poxumanavofeboz.scienceontheweb.net/bolens_21_inch_push_mower_manual.pdf
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/8912936.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bifiwapaz.onlinewebshop.net/panasonic_inverter_microwave_oven_h97_h98_repair_fix.pdf
    • https://uploads.strikinglycdn.com/files/490deaad-37e0-4580-999e-1ac29189a873/lomowiwuji.pdf
    • https://uploads.strikinglycdn.com/files/8814649f-7ecb-4882-baae-d8b4c4e191db/asp.net_mvc_5_dependency_injection_unity.pdf
    • https://uploads.strikinglycdn.com/files/9edc22f5-3a0b-4cee-921b-5d84d9c827c3/kenneth_e._hagin_net_worth.pdf
    • http://dijipola.onlinewebshop.net/bhagavad_gita_slokas_with_meaning_in_tamil.pdf
    • http://noxumalog.onlinewebshop.net/call_center_training_conversation_script.pdf
    • https://s3.amazonaws.com/zuwimadaneb/40951313160.pdf
    • https://uploads.strikinglycdn.com/files/5faeed63-dde3-44cf-bc88-20addab8fbb2/wuxutatolojadutogawuva.pdf
    • https://uploads.strikinglycdn.com/files/4cf6c0d1-dcea-47c6-bcbd-b642ac6da5ab/ranger_bay_boat_trailer_parts.pdf
    • https://s3.amazonaws.com/dubiditiginowo/estudio_del_trabajo_2_unidad_4_datos_estndar.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e903.bin
0ec9b9e4e5a6caba8af32b0551cd0e28375d3b88c931fc9bbb38117b0d131941		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 5380 bytes
font_01_sfnt_off0000fb77.bin
350d9bc0c95d6a2a22396afb532673cac57ef0d7091dfab2978cd88cb469cab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 11328 bytes

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