Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7ced165d414a5f…

MALICIOUS

PDF

82.8 KB Created: 2020-11-25 15:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5c6041ac809c019021a77390f93da4ff SHA-1: d5da40ac3dbf39966e58bf409ad2bcb5d0c1d2b0 SHA-256: bb7ced165d414a5fe7412b56c549ed40974751eaf3a245e534b576dae80b47ef
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 link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing or malware delivery attempt.

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
  • 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://ggtraff.ru/aws?utm_term=white+t-+shirt+mockup+psd+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_5f9770a78e901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f88c2c505e50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5faa8b7194552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_5fa72a8e0301e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409413/normal_5fbb24e7476ee.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/188514d2-1df7-45c6-9ae4-aa658f651a0c/2004_polaris_sportsman_700_twin_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/trapping_rain_water_gfg.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/dukuw.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/plato_allegory_of_the_cave_50_essays.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/49721705215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51396e74-5d0a-4f18-91f8-ffb35d838c46/punolixadeguberunilaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/fedex_intra_canada_air_waybill.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/72682990340.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/xopurutafedofas.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_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 5264 bytes
SHA-256: a840f6a0e8e0ee75b27ac905b272b18a55a2b2f40fb98e2c41e49fcf082d302d
font_01_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 10400 bytes
SHA-256: 8466d8690f4ab699187c535c740b68e54e79bfd095f6aa23e9419b14d30461ac

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