Malicious PDF — malware analysis report

Static analysis result for SHA-256 0988a6e11ac25d60…

MALICIOUS

PDF

72.0 KB Created: 2021-02-14 18:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e8df214cd8c55b2a5b2ecd86a04c1872 SHA-1: 07912708390167e55ebb594f0f70cd2cb573acd6 SHA-256: 0988a6e11ac25d60b28b7b98b7681351e7710d2e59924d0c08092c05d749ab87
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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/wix?keyword=food+chain+lesson+plans+high+school PDF link annotation
    • https://jelakuge.weebly.com/uploads/1/3/1/8/131856802/2d82f03e7cbbeb6.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/ce4bcccd89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379961/normal_60098afddf40e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374175/normal_5ff1925726eb5.pdfIn PDF document text
    • http://wetepuzasuvuroz.22web.org/feperexolenuwefito.pdfIn PDF document text
    • https://vuguwawu.weebly.com/uploads/1/3/0/7/130776175/16b34.pdfIn PDF document text
    • http://basepati.22web.org/9029805478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485823/normal_6010c1cc4a778.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/libeganot/dopituwapagititiniveduwe.pdfIn PDF document text
    • http://zabojalujetilun.rf.gd/41554244291.pdfIn PDF document text
    • http://vaterojot.epizy.com/bepovowogazosiravizavok.pdfIn PDF document text
    • http://fozoxorosemaxo.epizy.com/38496440891.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/fesoxiluwodupijo.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/45962373118.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/20488798267.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/99522656494.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_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 5196 bytes
SHA-256: d06c953ef05a474706b2b0e731efe9bd603936ccff5450501a6ea2d0df569aeb
font_01_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 10372 bytes
SHA-256: 111e3be5d19247ba920889caf5137f915ce1c6d383c7ac0345b4db7624d54d19