Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adcbb90f740b6e1…

MALICIOUS

PDF

68.3 KB Created: 2020-12-15 06:13:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4bbc0a05f976ddeded734917218b0f54 SHA-1: d19fbb3fbee8385ee39e579e82fb3a3ec78c03f7 SHA-256: 3adcbb90f740b6e13fd92e81192ec38d803a027112b1044bb6c3b5c692656330
104 Risk Score

Malware Insights

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

The file is a PDF with a high ML classification score and ClamAV detection, indicating malicious intent. The presence of an external URI pointing to 'trafffi.ru' and the heuristic 'SE_URGENCY_LURE' suggest a phishing or malware distribution attempt, likely impersonating a delivery service like FedEx. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/123?utm_term=fedex+fort+wayne+independence+drive PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8d8062ab9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489402/normal_5fb6bf32055b8.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://uploads.strikinglycdn.com/files/e141d31b-c20a-468b-8930-20e94be07d0e/74603703738.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a06205-51e9-4f6f-ab1c-ae0a537ee4c9/paintball_unblocked_games_76.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0df4696-c12f-4050-96a7-a801270f22a1/fanatical_prospecting_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7735aeb-4f62-4df9-800e-65e290beb033/guia_ceneval_contaduria_2018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57785be9b69395129ae53/t/5fcc2654662d5e24e0929564/1607214678773/police_car_driving_offroad_mod_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d3b824c-9f58-4515-8568-5a3a091b0c45/magruders_american_government_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3c9235-74f2-47e7-b2b4-0860f3ba2ee1/32200895393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77661669-acf6-49dc-a3cc-fdff1b9150bc/hoffman_estates_park_district.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/estudio_inductivo_de_la_biblia_galatas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c77aa42c-9e46-43b0-84fa-0c99be0451fc/el_cuerpo_humano_usborne.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_off0000c0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0EB 5004 bytes
SHA-256: abef9a6549590dbfd011d5fd09d86b848cc4fefc72ff79ebf7b0fe3423d407f2
font_01_sfnt_off0000d219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD219 10696 bytes
SHA-256: 26b6582e2757df6c3d55f044d73aa196aa258005e2ed3ed0d7a0047dc2b8227a
font_02_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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