Malicious PDF — malware analysis report

Static analysis result for SHA-256 341743ae58339fac…

MALICIOUS

PDF

83.2 KB Created: 2021-01-17 14:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 089c2945129c5415c62071f7d01fa7c0 SHA-1: 779732c9223c5acf59c61e22546e606e5c3379b0 SHA-256: 341743ae58339fac7262f3e9350539728c300feda6a55397f9d8f635b36d5a80
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafficel.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=writing+a+hypothesis+in+a+lab+report PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403121/normal_5fd33f90b9977.pdfIn PDF document text
    • https://site-1180467.mozfiles.com/files/1180467/panic_alarm_system_in_car.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fd6c705d155f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481397/normal_5fcc502475236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_5fe8e06263281.pdfIn PDF document text
    • http://maroron.22web.org/inventory_sheet_for_kitchen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f8d9564e82a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417814/normal_5ffded7126eb0.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/gotenukevepunin/83663092320.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/breakout_edu_answers_late_for_school.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/office_open_xml_document._docx.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/case_axial_flow_2388_combine_service_manual.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/tuxagamis.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/tamil_movies_utorrent_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/44667611916.pdfIn PDF document text
    • http://tinosizifaxuful.epizy.com/stalker_call_of_pripyat_mods_deutsch.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/buku_ahmadiyah.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/house_rental_agreement_format_in_tamil_download.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_off00010887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10887 5336 bytes
SHA-256: f3124b4c4e49d15da86c642330fccdfdbcd7fc857df23544cc56cb55164761c0
font_01_sfnt_off00011aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 10772 bytes
SHA-256: 2903c673eec945af7dae9082ca8cc46a7c959dcf579c3b31276549d0c231e16b

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