Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b9ec1b0e2e0a3e…

MALICIOUS

PDF

71.2 KB Created: 2021-02-15 23:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eede9805945136c7e681d9e46c0cd3f0 SHA-1: 8181230ee2fa186b2434932aaded7b3c03a627b1 SHA-256: 51b9ec1b0e2e0a3e0eede0d9e1f6bbd6501277fdae068c4c18094e67b8c2536f
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=adp+api+examples PDF link annotation
    • http://mirror-x.org/mor_flo_water_heater_priceo2nha.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/bubekunitabesi.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/jeguguwolopu.pdfIn PDF document text
    • https://degevibuv.weebly.com/uploads/1/3/5/3/135316410/b925516f0.pdfIn PDF document text
    • https://zibakuponitek.weebly.com/uploads/1/3/5/3/135303957/0c369644e18240.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/puzzle_mania_book_oliveboarddke8a.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwunikuneg/3hgiji5/94778914591.pdfIn PDF document text
    • https://lelusujizuzu.weebly.com/uploads/1/3/1/4/131438438/90cd395cd.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/gcozNEN/slingshot_technique_basketball.pdfIn PDF document text
    • http://winsbig.space/marine_ribbon_chart6hkda.pdfIn PDF document text
    • http://gsmall.space/489322410375isbf.pdfIn PDF document text
    • https://pexajutamog.weebly.com/uploads/1/3/4/7/134759810/7076c97ae1025e.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/bhajeji/radiohead_albums_portrayed_by_spongebob.pdfIn PDF document text
    • http://sesalon.xyz/69056524578t9z76.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/wumodukubaru/pewotamigofevosurate.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/lobaxigezegewijetemekozit.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/birthday_invitation_card_template_india.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/77664170026.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/ahmet_mit_ak_kpekliktir.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_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 5064 bytes
SHA-256: ddaf27acd72597f30a1d7601547521fa7b37cbb1760b57da186151b4bfbffcfd
font_01_sfnt_off0000e935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 11300 bytes
SHA-256: 7076cc035eaf75ae69e5eeb0920f6f41f99be76bf6f8930afea933498eda780c