Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fe3a5c15170fe8…

MALICIOUS

PDF

68.9 KB Created: 2021-02-22 13:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 36e6c13539057fab33ee4da5021cfd09 SHA-1: be56dff57b1da20673a9629bb84d62eeb04be5d0 SHA-256: 35fe3a5c15170fe8d375875a2395cc49ccb4fb2b70a53be999572eb720cf8495
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/aws?utm_term=ignore+the+guy+get+the+guy+free+pdf PDF link annotation
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/8977523.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/9397289.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/gi2iijj/39867996800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_60285d3b21c2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460446/normal_5ffec07069277.pdfIn PDF document text
    • https://lotefexikig.weebly.com/uploads/1/3/4/0/134097130/nuwelojapexidet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476436/normal_5fc697c3dd753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450878/normal_6002447472cce.pdfIn PDF document text
    • https://cdn.sqhk.co/vibebexez/hjhibmM/snapseed_app_for_pc_windows_7.pdfIn PDF document text
    • http://kinorio5.xyz/najuveguxatatofxrbdv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406497/normal_5fee2aaadb2f3.pdfIn PDF document text
    • http://creditreportusa.info/tutevuxagobudegigegiwx8n0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459628/normal_5fcc5d304187e.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/gfha2Io/4_pic_1_word_5_letters_snake_smoke.pdfIn PDF document text
    • https://cdn.sqhk.co/tovozovuzedu/7CIhgrw/95666525581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fc89788a3d23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390663/normal_5fceadbbd9bd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480162/normal_5fdf025ac1ef8.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_off0000d37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37B 4920 bytes
SHA-256: 00f3f47f65bef345174429d3af04a0cfbc9e8d15e20190f3236be213a27b39f8
font_01_sfnt_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 10120 bytes
SHA-256: d1792526735576d1335645b34c549b6ce2b93150f7c7b9db4299e9471e64f2a6

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