Malicious PDF — malware analysis report

Static analysis result for SHA-256 52210541761a50a9…

MALICIOUS

PDF

65.0 KB Created: 2021-02-15 06:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5f1469dee8980f8c82d09ebf3cea34e9 SHA-1: a623e6359baeed6ab4eec814d0b0bfd3fdaedd0b SHA-256: 52210541761a50a97345c052a265bad07d14e999afceb7c1785320c4d38581f7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=staples+shredder+spl-txc12ma+manual PDF link annotation
    • https://cdn.sqhk.co/pifajaloro/hjggaja/retro_games_plus_milford.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/7jg8zRI/pikuvonupujafa.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/eDijV87/doom_eternal_extra_life_mode_tips.pdfIn PDF document text
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/zatixafejemiv_xatori_xilipow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415748/normal_5ffcb691020fd.pdfIn PDF document text
    • http://persequen.com/marilyn_hickey_signs_in_the_heavensm3exw.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/nhjgjA2/19551466271.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/QrNhgij/piwikigupudomufurukezo.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/iaOeZjb/11571416510.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/5ih6Wge/59662460301.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/iduLHeE/dakofevejuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_6014e1f1ba837.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/bPujeja/2412904876.pdfIn PDF document text
    • https://nalakipivexovob.weebly.com/uploads/1/3/4/3/134385055/witijavomezedi.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_off0000c2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A7 5700 bytes
SHA-256: f2ff5c3132f608adeffa2b18620ae620067915904c8cd2198fc08cfe44adc517
font_01_sfnt_off0000d5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F4 9752 bytes
SHA-256: 9ef22712dbb4cab121501b82c2323d4d2ecc32db17458709e97fc73aafe371d3