Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e2278077186f52…

MALICIOUS

PDF

89.7 KB Created: 2021-02-21 17:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f23734afca3365c0e8dcaa16c5d173d3 SHA-1: f120522b1ac74b5f05c972dcb45ea01e065ddded SHA-256: f8e2278077186f521e15091375e3da0148c442718e974ee875c2aecf1c3b7280
294 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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/wb?keyword=ravpower%20wireless%20fast%20charging%20pad%20plus%20stand In PDF document text
    • https://cdn.sqhk.co/kelufuro/jdih6hh/jetpack_joyride_online_hacked.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jjjPsid/25157905741.pdfIn PDF document text
    • https://maposege.weebly.com/uploads/1/3/1/3/131378999/80a44de.pdfIn PDF document text
    • https://tuwebuliwarukor.weebly.com/uploads/1/3/5/4/135400964/tetesudorijejog.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/jBSaQib/hill_climb_racing_car_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/igcJUr9/nuwewula.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/Kbjb7tD/86039264116.pdfIn PDF document text
    • https://firupafawaxif.weebly.com/uploads/1/3/4/1/134109114/vukolomom-dulepizi-tepepoda.pdfIn PDF document text
    • https://cdn.sqhk.co/zovifesojeme/6hpjcjh/skate_art_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/hbfVcjb/96800582031.pdfIn PDF document text
    • https://cdn.sqhk.co/zerurukoraju/idicjj5/dufekan.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/bejokazemur/susie_nash_northern_renaissance_art.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/jatig.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/free_template_slideshow_sony_vegas_pro_13.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/ladojiteb.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_off000120df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DF 5576 bytes
SHA-256: 0c2aa52f8aea69065fb3fa25e532d0125fc9c2a386c838c2b6b239e810ecb7b5
font_01_sfnt_off000133ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EA 11128 bytes
SHA-256: 2294731340574f51b52429aff146b0186a7269494e4f8c5e2b9403840937dd7f