Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf50825ac8f17f3…

MALICIOUS

PDF

64.3 KB Created: 2021-02-11 04:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b386d560b037108a4e25314749cdef6e SHA-1: 5cd618ca940147efb4ba7708a836518e5f8afa30 SHA-256: 3cf50825ac8f17f3817ab2f9f7fb3f8798f8b72c93e855c75545f58747515d14
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=blue+finger+tab+pdf In PDF document text
    • http://forecast.bet/499250559939oviu.pdfIn PDF document text
    • http://static-get.top/70063347504qgsyf.pdfIn PDF document text
    • http://neyroskakalka.site/sowukuwakekbhkr.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/heZmuif/lamexomun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_60171beac55a9.pdfIn PDF document text
    • https://cdn.sqhk.co/kilatelazobe/hIlldgd/logo_sticker_maker_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/eKhhUgf/sosapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482636/normal_6014dc71d8f21.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/xJOJjj9/juwob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372983/normal_601c86189f32b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fd22d54dafe4.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ii5gjzO/fuviraziwo.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/fonojitifizumovojavcc0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pezofut/8644571071.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/19764465889.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_off0000bec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC2 5220 bytes
SHA-256: 3914a6bea1133cbd6c343245faf07e6bfaa1fc57ed9daf6024906489cd3dd7df
font_01_sfnt_off0000d094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD094 10684 bytes
SHA-256: 8ead50bf98a9753e7f61f425cdd6e0f0bc47ef703030be6f9fe6c9049ea95bb0