Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2eee37e247e1a8…

MALICIOUS

PDF

74.5 KB Created: 2020-12-17 21:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c2815407ab7866d5509e7407fee3951c SHA-1: 926ac995f7ebd69a9324522be1a6bd35d39927ae SHA-256: 7e2eee37e247e1a8682b89ef3d35952c7cea1df79074a98a9d114707b2618b30
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection strategy. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=playboy+bunny+suit+cosplay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427523/normal_5faa0b6d43fa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f902fbf62c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5fad7cfe8750d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5fbf6cafefba8.pdfIn PDF document text
    • https://minezutoka.weebly.com/uploads/1/3/2/6/132695516/mememugeb.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/wivasimetujiw.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/rebomedug/indian_baby_shower_invitation_templates_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd38b13140135cab5f171e/1606236337710/fedoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/breuer_text_medium_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/tamil_hd_movies_2019_tamilrockers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf61ade18c5c478ef3cf10/1606377906516/ap_human_geography_chapter_6_religion_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/36197863277.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_off0000e676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE676 5072 bytes
SHA-256: 4c2c4d91d3e6f18fb932c1f8ac6692429809c9b1c3d7c18b5140081bdd31a916
font_01_sfnt_off0000f7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D0 11388 bytes
SHA-256: 4146ea7c821938a6522a8ee83ffb7563b178a2d53162a61b02079cf5554b7562

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