Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db07ac75782e25c…

MALICIOUS

PDF

64.4 KB Created: 2021-02-22 21:50:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 86b498b8c80d782ac1d0e878484065bb SHA-1: b7b25c11798c40f1dc6d2fd6e619c71390b55703 SHA-256: 4db07ac75782e25c436304ee8973066b453a781503c1c6f6912785fd6f22f9a3
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://baarspo.ru/strik?utm_term=samsung+idcs+18d+manual+change+time PDF link annotation
    • https://cdn.sqhk.co/nipigagavadu/8WhfQjh/23131524354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477658/normal_5fdbbd226efd0.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/nazivojadovidogapugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_602cd74996839.pdfIn PDF document text
    • https://nigipesifagezeb.weebly.com/uploads/1/3/1/4/131411762/vipuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/gEjaSst/curvy_punch_3d_mod_apk_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/Mhjghgd/medieval_fantasy_warrior_woman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_6028a784585ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371806/normal_60058fc5b456b.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/hiidSm6/skywars_map_minecraft_mini_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_601f312289cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_5fda3ff96da17.pdfIn PDF document text
    • https://tuwowezofe.weebly.com/uploads/1/3/0/7/130775341/417595.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/wujafivabipo/memumelaxonakelipo.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/10892592222.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_off0000bded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDED 5608 bytes
SHA-256: cc4dca5073b1c313954cdda21f28c575cc9404852e577735b64c8f3c09a3a90e
font_01_sfnt_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 10532 bytes
SHA-256: eafdb91f2fe70ae1b647691a0c3ea459147c54509fbc35d479e9745e88b24621