Malicious PDF — malware analysis report

Static analysis result for SHA-256 640296a7effe16ed…

MALICIOUS

PDF

81.5 KB Created: 2021-03-18 14:04:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1cf9587b57561421172a58c1f19dd7a2 SHA-1: dde71dcd69a226d233c57fd22ebb2fe84db0a49e SHA-256: 640296a7effe16ed7bf0e36dd0a2078528be1271783edc1113a94ec0043f5d1f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a URL that appears to be a lure for downloading a contract, suggesting a phishing or social engineering attack. The presence of multiple benign-looking PDFs alongside the malicious one indicates a potential attempt to blend in or distract from the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/wix?keyword=non+exclusive+rights+contract+for+beats+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369496/normal_5fcf750ee6b79.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/gokupafofokegidomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601fff574619b.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/wunupalezozerud/aplikasi_simulator_arduino_di_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c5a14e6-ad58-4431-943f-471d13a8d94d/how_to_tell_if_your_electric_hot_water_heater_is_going_bad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b974d084-ccae-46c5-925f-a24d8fa0686e/what_are_the_types_of_training_objectives.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/80437297842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a8fd754-7948-4e29-9938-7b082979f423/food_safety_procedures.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/inverse_operations_worksheets_year_5.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/12674551039.pdfIn PDF document text
    • http://xepuzakudera.atwebpages.com/fipolomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6f7d8c-7a0f-4d08-984a-6aa41401a9aa/texuxaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b011f683-4438-44f7-b0b9-35fc6d07ed73/military_decision_making_process_mdmp.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/aswamedham_poem_summary_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/80169615629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454d8dd0-010b-4cbd-b9fb-73b424c190f7/how_to_factory_reset_palo_alto.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/best_android_antivirus_malware_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd15346-4f07-4568-b9fc-b97cbf8fb116/lugufelibunodilezelim.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_off0000fcd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD1 5652 bytes
SHA-256: 1f41654dfe39e2cf5ead955c57351c19dd229433de3895aa3a8789b542b58ac6
font_01_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 11312 bytes
SHA-256: 4187d0e5596e94ab0a56744d555c814519d3a920e8c159ebe020130ad0c89dba

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