Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8cf2e5f2e6be65…

MALICIOUS

PDF

73.1 KB Created: 2020-12-15 07:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 227c475d33a3427843d47e5d5a6eed43 SHA-1: 30f8537dd6164e8ad59e68a93492d325fcab851a SHA-256: 2f8cf2e5f2e6be651817d4fab1b153c6751af6f37c845cf2433fe4305b7db7e8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?utm_term=partes+de+un+motor+electrico+en+ingles'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/123?utm_term=partes+de+un+motor+electrico+en+ingles In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fb41ad65b94a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_5fb29b30ead3d.pdfIn PDF document text
    • https://kugodago.weebly.com/uploads/1/3/4/4/134491336/lusilataviludova.pdfIn PDF document text
    • https://ginamelemu.weebly.com/uploads/1/3/4/6/134624442/c912c9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456378/normal_5fc3fc9ed9e89.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/4abd2f2c4c9080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386091/normal_5fa6d65677e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f8dad7f9c62e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5fbe2bf170762.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/1bffbd09-969d-4ab4-b7bd-34fafbb96855/juvexabadugosilogib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859b1000-6310-469d-a10e-55a0b39bc427/jezatuperavegijuru.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/64415756807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8db139-6392-439d-8987-8581971871de/everyone_is_john_scenarios.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/organisation_structure_chart_template_excel.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_off0000dff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF2 5260 bytes
SHA-256: fdbec444bd39f17f064e3382b23c2e4d608450f04f9647c2ba202e2bd42ff8c6
font_01_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 11056 bytes
SHA-256: b27c836921160f0fae91d602358d3458ee5f54abaf38edc52e5a59ee6566803b

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