Malicious PDF — malware analysis report

Static analysis result for SHA-256 55eb7ccf7678a413…

MALICIOUS

PDF

77.1 KB Created: 2021-06-09 11:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ec71500ad2665492eab0167dac5b3741 SHA-1: e1294d69e73719e007db0cd89407a74232126a4f SHA-256: 55eb7ccf7678a413975d6a5d0f7e9f4279fa34810a165d47f09a66018aaefba3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://ponafet.ru/123?utm_term=south+africa+food+based+dietary+guidelines, is likely used to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit the user's interaction with the document.

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://ponafet.ru/123?utm_term=south+africa+food+based+dietary+guidelines PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373749/normal_5fc8a6f6014c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_6014bd68918e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_60416370aeeef.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4428045/normal_60b10a022ff87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403274/normal_604fdd26a2635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449776/normal_5fd8f4e07f532.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_6068f0e4e7402.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4377902/normal_60b1e7b11e199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_606017aa54647.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/fc21d43d-5f93-470c-a004-8d7a116f809e/2020_lexus_gx_460_consumer_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe544f5-28c1-4cd3-96b8-0af62285098c/california_real_estate_license_exam_prep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc78e33-d65c-4d65-a73f-11cb2b53d656/systems_of_equations_word_problems_substitution_method_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0898e46a-0a64-4c2d-af71-69dc611550ee/cummins_x15_engine_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/290da64b-804b-4ae7-99c1-0ad5493d6abb/how_to_control_your_man_in_a_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5fdae6-c3f9-4cb6-9812-cf44ed1eb3c8/how_do_i_connect_my_polk_magnifi_max_sr_to_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a03ee59-8f74-467b-8b51-d4c68c281f68/2012_hyundai_sonata_hybrid_oil_capacity.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_off0000ed92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 5628 bytes
SHA-256: 571113560214d6b6e9e483e7f3295b3dfa04f4706d7df794a9ec15c3824739db
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 11572 bytes
SHA-256: b46ccdbc535a3edef5d82e876d8dd37b7d166de1462133be7f8c980596490e3c

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