Malicious PDF — malware analysis report

Static analysis result for SHA-256 f67f204b80a2ed29…

MALICIOUS

PDF

67.7 KB Created: 2021-02-14 18:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c303ca16432aa3f2117b8a0a1e0b4a34 SHA-1: 0d597141d1268a4202a4fa51f5173cea0dd8456e SHA-256: f67f204b80a2ed295f89b5ac44dafee3b3816a5f720784e63d2ad4a7f1679d23
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wix?keyword=van+buren+elementary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388271/normal_6026fa8bbb585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_6006b48b96670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_60257942d0e6a.pdfIn PDF document text
    • http://walletelectrum.buzz/nosixevm02i2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_60225e08b0607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6019c116cdf99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492281/normal_6023fe91f05fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487409/normal_5ffebd7e88d30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_5ff618e64c5db.pdfIn PDF document text
    • http://nowtorrentz.com/picture_tosx9jk.pdfIn PDF document text
    • http://xeeewq.xyz/58153792646ov7.pdfIn PDF document text
    • http://testersairf.xyz/60967934911ediya.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496402/normal_5fc8365887c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370266/normal_6000bb5a17596.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_off0000cba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA5 4860 bytes
SHA-256: fdef5baccefee731fe5b7d3e0050cb2ad1ad790b3444994db9734f19eeb72bc1
font_01_sfnt_off0000dc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC21 11208 bytes
SHA-256: 8d9cc132ce12182d1d9c857986a5b3d0ee9f31bcbf26e7ba413d17f07e7e5fbe