Malicious PDF — malware analysis report

Static analysis result for SHA-256 644960c50c6cbed4…

MALICIOUS

PDF

74.2 KB Created: 2021-02-25 22:56:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5903b06216df3a45bbdf98e9d6e87988 SHA-1: 1e29710aad5e295f92d2b1891933c475d8289510 SHA-256: 644960c50c6cbed4592838ea3bd78430a97e0633407ed208ac4ef1bd65b2a3a4
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://maypoin.ru/wb?keyword=what%20is%20the%20importance%20of%20argumentative%20writing PDF link annotation
    • http://taxevidel.medianewsonline.com/bokawadilatusu.pdfIn PDF document text
    • https://susokeruno.weebly.com/uploads/1/3/4/6/134656617/9444277.pdfIn PDF document text
    • https://kufaxaza.weebly.com/uploads/1/3/2/6/132680799/gerutorakef-sibokipuzix.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/kjdiexf/fireboy_watergirl_in_the_crystal_temple.pdfIn PDF document text
    • https://sisuveraxom.weebly.com/uploads/1/3/2/7/132740665/badugijezulisula.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/DidYZic/2208432519.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/4256549.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/jibhgxd/tegan.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/metiwisivakafefiwatid.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/bijlhfp/safe_fcu_mobile_deposit_faq.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/vuxagixil/46571494012.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/zeteva.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/55796721006.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/34343171314.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/jutanax.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_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 5560 bytes
SHA-256: 8bf4ff8d1add8956180b9e4dcd6a9b02fc4888a1451614bc52eaae7b0b3c4097
font_01_sfnt_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 10508 bytes
SHA-256: 1122433d3343c977d0282f4a26b39e910bb4a197829ad10c94d006bcddf8f40d