Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dca8aaa400c107c…

MALICIOUS

PDF

72.0 KB Created: 2021-02-26 21:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d9db71d6c92d421f3b78d309b83354d7 SHA-1: 413c10b05b3877b3614139bba8be01891e5815bf SHA-256: 3dca8aaa400c107c19b1f319f56cf4cd8ff685c67d53e8a0e264f1d4a24c43c0
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://jumiwimov.ru/award?keyword=samsung+rs265tdrs%252Fxaa+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463264/normal_6021cd8d9c7ce.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/hii3Pgc/wimefatefuw.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/the_power_of_habit_chapter_7_summary.pdfIn PDF document text
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/92a2d66fce1d1e1.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/FggbNjj/buzuxafuxevedizap.pdfIn PDF document text
    • https://xezixopizanew.weebly.com/uploads/1/3/5/3/135314636/3460239.pdfIn PDF document text
    • https://momugidofene.weebly.com/uploads/1/3/4/2/134235368/4fff3287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_6011586fa4a66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_602791f81dfee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5fcddcaf15878.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379030/normal_5fdc9b2794c7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478133/normal_5fed6bf262a5d.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/evhh9ib/molaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5fdc32a240f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_603044031fc0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481278/normal_5ff3647e8886d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5fe06f0091647.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/Sgjidhj/bubble_shooter_gratis_online_spielen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_600f82c53393c.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_off0000da9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9C 5936 bytes
SHA-256: fb2fffeceee6c0339b52d86d82cb606c4bf75f0333f037352187e8582ea7cdd2
font_01_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 10468 bytes
SHA-256: 289c3580e33bae16ad51edf8f35077adb22d5cb87cea75f64a813a5c5d736cd1

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