Malicious PDF — malware analysis report

Static analysis result for SHA-256 c141b54874e65773…

MALICIOUS

PDF

67.2 KB Created: 2020-11-20 15:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c33f0efa88bbd0ff121e99723b088379 SHA-1: 9b8f6de8b581578d98f3105a976eda2cbb2d2581 SHA-256: c141b54874e65773aa681ec2f8443c5fec1869fe2ac147c019506956383ecece
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 0.9998

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://traffnew.ru/123?utm_term=evaluating+numerical+expressions+worksheets+6th+grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5fb5ebd543889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fa30ac2273ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_5f8c74efede88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495039/normal_5fb2ac9a6b341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_5f9fc10232764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_5fb6db5052878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451545/normal_5fa4495b0ae55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505096/normal_5fad84b5a0f05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501367/normal_5fb25bba9f644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379844/normal_5f944b5882961.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385214/normal_5f8ef325e0bca.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/zewimu/jammu_university_result_marksheet_b._ed.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/kulib.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/bokeh_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/guided_bus_timetable_st_ives_cambs.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/aids_and_hiv_full_form.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_off0000c4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A9 5880 bytes
SHA-256: 977107004327211739a35b236f9bac051029d30d1b7872fcfbe9977f1b26c871
font_01_sfnt_off0000d8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A2 11532 bytes
SHA-256: d645da7627d870fb8b9ccf80ee5cb6cb2d825bd69daaffe9cbb406167cacb743

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