Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f6d57e0adfe1f7…

MALICIOUS

PDF

65.7 KB Created: 2020-12-17 07:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c2e92f53e46a963bc7f6f8a129293ac SHA-1: 601eaef079482f09a5784b4f689a0d54f43b2f91 SHA-256: 83f6d57e0adfe1f7f2502623f73625b97b5fb0170ecb17d1c1f545b68eca6fc6
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 indicating it links to known malicious redirector infrastructure. The ML classifier also flagged the PDF with high confidence. The embedded URL points to a suspicious domain, likely serving as a lure or redirector for a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gettraff.ru/strik?utm_term=mila+mercado+integrado+latinoamericano+wikipedia In PDF document text
    • https://geguguxe.weebly.com/uploads/1/3/4/5/134513061/sixezo.pdfIn PDF document text
    • https://fitijozis.weebly.com/uploads/1/3/4/3/134372299/9302580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383146/normal_5fb9698be8f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_5f8c0b14e0b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_5fb8daa6b5e20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416131/normal_5fa22e2555c7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4ec032cf09257bd856c41/t/5fcc10f68a55f2188b652f0d/1607209207241/fuxebewesibag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eecaeafa-8440-41eb-9c38-cb9b612bfe20/bedapezisigivu.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/xemipafu.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/work_timetable_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_off0000c127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC127 5376 bytes
SHA-256: 8fd6a2d3141b701e0308a98f01ccbf5c2570a5e5222780c47896ee702a478eeb
font_01_sfnt_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 11312 bytes
SHA-256: f99452906ab79265612252d08d49dcd5a1422f1279b92ec1f4c607277475df86

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