Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75da3b9f88c23ab…

MALICIOUS

PDF

63.8 KB Created: 2021-02-25 09:52:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6dc95add26872856303d353c41d88a1b SHA-1: 4479dd4beb29ad4bec1f5065201a425ec228d783 SHA-256: a75da3b9f88c23ab93af2c47372ab4db12fbc10674c2d660d3238c5648ddff52
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=radiation+worksheet+ks3 In PDF document text
    • https://cdn.sqhk.co/ledivure/h4ohgLx/550_cord_walmart.pdfIn PDF document text
    • http://vquest.website/hibbeler_mechanics_of_materialsavmum.pdfIn PDF document text
    • https://cdn.sqhk.co/bomagomax/oDifDLL/paximubelasoxinapejuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/motulobugaji/hbsqcPg/76087506538.pdfIn PDF document text
    • https://cdn.sqhk.co/sojejinof/hqFgg8Q/61443521776.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/puriw_bagutavefewejik_nuletiranef.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/ezziihj/plesk_hotlink_protection_linux.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/RIYl2hO/100_sounds_for_baby_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xolafunodo/hibPPjd/fodaratesiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fcd361a16e67.pdfIn PDF document text
    • https://tavabaxo.weebly.com/uploads/1/3/1/0/131071290/menez-pinis-togukaxifuna-wixaxesinamiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rogofijanititad.epizy.com/66640531296.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_off0000bf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF14 5208 bytes
SHA-256: 8ad3074a73eff399c1cac2c88dc0b6b413f15b59523e8080a86e4d7a748a924f
font_01_sfnt_off0000d0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DD 10008 bytes
SHA-256: dbdd00a13810380bbf65f406c70a7bebe79333d372dd6c8f274389bd0fa12006