Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26e65e075c5a42d…

MALICIOUS

PDF

78.0 KB Created: 2021-01-13 19:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bf590cd136f8a9c0cf3983ddd75732f7 SHA-1: 4f7aa76aa0e7e67da80dace0d00e3148b2351c0c SHA-256: b26e65e075c5a42d32e5288285701f3f7fd9f63be2918329d44264cea349255a
214 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 embedded links, many of which point to redirector infrastructure and potentially malicious content. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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.
  • 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.
  • 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=medscape+psychiatrist+compensation+report+2017 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_5fbd5e384eee8.pdfIn PDF document text
    • https://cdn.sqhk.co/daboxazile/NZwNvjb/vifedezufikodamonibeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f95fb225d93a.pdfIn PDF document text
    • https://site-1166652.mozfiles.com/files/1166652/scert_assam_odl_marksheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_5fcecdff4664f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_5f8b9a5c0d825.pdfIn PDF document text
    • https://toxedozopofezi.weebly.com/uploads/1/3/1/4/131453782/4e42f8e6b45ac7e.pdfIn PDF document text
    • https://site-1213735.mozfiles.com/files/1213735/wapemukojaweraforawotapax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5fbc6a3ea855c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469852/normal_5fe7d45f6e91a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f878c6450b9a.pdfIn PDF document text
    • https://site-1172440.mozfiles.com/files/1172440/blades_and_rings_game.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/fceQgdq/fesogexerizirulivawufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477409/normal_5ff12760d45f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409619/normal_5feaf94751387.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487413/normal_5ff0417494c80.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5792 bytes
SHA-256: fdd651fcb69e47fd83132c3002eb7ab193afe63ee18dce74ee131c9cfc16a910
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 11284 bytes
SHA-256: f4def53004e907c86370949f96c57af6c7b0b58e8fc4898093721536edd2b0df

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