Malicious PDF — malware analysis report

Static analysis result for SHA-256 8522d3f8e1141d48…

MALICIOUS

PDF

72.2 KB Created: 2021-02-14 05:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7e1a1fa695c0ac07790938efcee9c425 SHA-1: decea5023ea68f7b337c3a0d06e78ef3613514aa SHA-256: 8522d3f8e1141d48f7483af26e8268ba6cad561c6f24e72025ac36edc4adadc0
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://baarspo.ru/wix?keyword=clash+of+legends+davenport+ia PDF link annotation
    • https://nabaduvikarupad.weebly.com/uploads/1/3/4/0/134096068/noxofelul.pdfIn PDF document text
    • https://titepusigob.weebly.com/uploads/1/3/5/3/135392267/694050.pdfIn PDF document text
    • https://linabodaku.weebly.com/uploads/1/3/1/1/131164293/7898b8a2779.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_5ff07c86efaa7.pdfIn PDF document text
    • https://suzagosezamonu.weebly.com/uploads/1/3/4/4/134446802/8f79445f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_6022e831d33b9.pdfIn PDF document text
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/2300695.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476946/normal_5ff7b87a065cd.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/cc7a73b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_6023bfaa827e8.pdfIn PDF document text
    • https://guwizufim.weebly.com/uploads/1/3/0/8/130813931/bowutotasi-wexigo.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/vukumesoj/chicken_invaders_4_2_player_free.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/17742305456.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/axa_malaysia_annual_report_2018.pdfIn PDF document text
    • http://pomogaxelako.rf.gd/format_aiff_cd_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/mariam_khan_reporting_line_actors.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_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 5268 bytes
SHA-256: 3d9d7a9dbc77385ccec35ab9e4a18624ae36877f8989aee8e07e6e7d031df766
font_01_sfnt_off0000ef7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7E 10672 bytes
SHA-256: 4591c03174499fdb94fd66f6143b014697958f287a63b755fc02d652f935ac20

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