Malicious PDF — malware analysis report

Static analysis result for SHA-256 952bfc8281f405fa…

MALICIOUS

PDF

71.2 KB Created: 2021-02-06 15:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 39b7f0ce67c7ee26b4b511bd811c7e38 SHA-1: bc1e87c07a5c7617fa7e0d21cc80efa76094e9ea SHA-256: 952bfc8281f405fa887a72ba75b647867effcd8168d11d794ee44c0539a4eeb9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=barlow%20condensed%20free%20font PDF link annotation
    • https://cdn.sqhk.co/naludibeg/jfhc3hi/kazasuluduviganisijago.pdfIn PDF document text
    • https://cdn.sqhk.co/magatile/yS1gggf/sirocco_fan_best_price.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/32f9bf08264814.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/cboxHmT/no_button_vape_pen.pdfIn PDF document text
    • https://viradigoposexa.weebly.com/uploads/1/3/4/3/134383508/tejugepabag_zulifurexoza_puzesodegafukop_xamemomub.pdfIn PDF document text
    • http://babysampler.com/international_banking_and_financep31hn.pdfIn PDF document text
    • https://cdn.sqhk.co/wexifidobafo/a3HOja7/molenevojututuwupoxus.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/Vdgi145/15443125800.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/zodererezuzuxi/27772396458.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/30611282769.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/widoxidexosaxewupeva.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/conformance_report_iosa.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/chatting_karegi_kya.pdfIn PDF document text
    • http://tesezozujib.epizy.com/kufejosixese.pdfIn PDF document text
    • http://bunurakugixopa.rf.gd/curriculum_development_process_models.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_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 5156 bytes
SHA-256: cd26ed9b20fdc94803b3de2e7ac07ce3acd0f6c551a1f0ff18716b85aaf63143
font_01_sfnt_off0000ea75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA75 11064 bytes
SHA-256: e182cf740251b2fe00fe0b09e8385d08973183d70d6a1c7c91dd136c3574b923