Malicious PDF — malware analysis report

Static analysis result for SHA-256 68db53dd51134b01…

MALICIOUS

PDF

75.1 KB Created: 2021-06-12 05:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9ffe0ed1380dd1bc1dfd166b738958bb SHA-1: eeec2a7c7e901fb5f0c95ab5cffe11f1f4aa8334 SHA-256: 68db53dd51134b01ac3ed4539e3b8156a2c5766c9d43fb1a7eef16f86cd12333
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://coretry.ru/pbw?utm_term=foolproof+module+10+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457861/normal_600fa2387dc3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_6006bc2596231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_60239a9578d68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_6054bb3e5eb16.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5fef188fb6525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fc7394fdb953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_602954ebce777.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464303/normal_5fe50abeed70f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447877/normal_5fd81cdf41c5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_606c74cc7a745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488139/normal_6052a7b04e6e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473031/normal_605a529a76615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_602b606d5368c.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/bfced3c1-f743-4a3e-8146-bab9800ed216/what_is_a_draft_bill_of_lading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29d5f077-b79d-4e1c-9f10-83362da529b6/kasulifonuborak.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144591288/lijuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf54d23-ff7f-4ace-9748-f788510194d0/verbos_irregulares_en_ingles_con_pronunciacion_y_significado.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/f/61510202584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b956377c-786f-4c05-b89a-98cdf84d1c21/53814590926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4636d3e3-de9c-40d9-9341-622c143074c1/63941346100.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_off0000e53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53D 5428 bytes
SHA-256: 3eba57800c33dd550e13153b78b678ace2d686a70c38a92d1c1c8e597fdcd918
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 11172 bytes
SHA-256: 394373cbf9e2ae1b2ec3bc4b048a65e6c6b92b5c015b94dba7aced3990edd6d3

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