Malicious PDF — malware analysis report

Static analysis result for SHA-256 4217584bfc9d7132…

MALICIOUS

PDF

75.6 KB Created: 2021-03-01 07:27:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b568852b50b3cfa8da19d5c413f045d3 SHA-1: 5086b2ee8fb1947cb92a6daa96382613a8541a02 SHA-256: 4217584bfc9d7132277c4244c4641279113612c3cae89556abd3bf2b4444f09a
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://yafferge.ru/aws?utm_term=fifty+shades+of+grey+movie+cast'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf and references the same lure text. This indicates a phishing attempt, likely delivered as an attachment, aiming to redirect users to malicious infrastructure.

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://yafferge.ru/aws?utm_term=fifty+shades+of+grey+movie+cast In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5ff08647771b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448096/normal_5fd0ac7a3fb6f.pdfIn PDF document text
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/lujenotikaxatu.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/mutobidupugepezu.pdfIn PDF document text
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/bodakalasinode.pdfIn PDF document text
    • https://pagopolekabob.weebly.com/uploads/1/3/4/3/134305888/b039b1b2.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/why_does_jocasta_kill_herself_in_oedipus_rex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473359/normal_5fee7dad7c03b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5ff7cbde84f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421940/normal_60304efbf0283.pdfIn PDF document text
    • http://dujojiwasemob.mywebcommunity.org/51973863542.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384650/normal_5ffff8570376e.pdfIn PDF document text
    • https://dusonomikeka.weebly.com/uploads/1/3/2/6/132695238/3963403.pdfIn PDF document text
    • https://buzixigadojaw.weebly.com/uploads/1/3/5/3/135316262/pagigitu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_6037f91413b02.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/bonivigilexofakanuvis.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/77766266218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_5fe6ed6fc0b70.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxujewov.myartsonline.com/23303084666.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5520 bytes
SHA-256: 3b4203f70b3f9db5dddd2ea4acc18edcce00d90f41bc89b21fcea9dfda8f2750
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 10652 bytes
SHA-256: d1ddbbb9e05443fbebe67b30499193c0ce83e43cf45d7108d2511d1902f273e3

Open this report in the interactive analyzer, or submit your own file for analysis.