Malicious PDF — malware analysis report

Static analysis result for SHA-256 3840c61db4648fa1…

MALICIOUS

PDF

69.6 KB Created: 2021-02-14 17:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 619c0bb9fe327a9cd1a99dd53b91359d SHA-1: f3ab81c9cafbeacda9cde1da7033e924d4843fd0 SHA-256: 3840c61db4648fa12e679083b117ffb9e4955d1edab588a11e0b342f5ab45585
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=schwinn+trailway+manual PDF link annotation
    • http://loginwithfb.site/wemokosofimenomsgwg5.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/woxaguboral_levaz_jijigavigusajaf.pdfIn PDF document text
    • https://xadatazibinul.weebly.com/uploads/1/3/1/4/131483053/fcde37fe22f.pdfIn PDF document text
    • http://udilische.club/morutivuwarokoxaro2ocy9.pdfIn PDF document text
    • http://steelsho3.club/tosasojegukixazokosulpain.pdfIn PDF document text
    • https://gafokogem.weebly.com/uploads/1/3/0/8/130874161/7137790c6.pdfIn PDF document text
    • http://beach-fruit.fun/fnaf_tony_crynightyznkh.pdfIn PDF document text
    • http://teaapple.space/68866216564nqtin.pdfIn PDF document text
    • http://theandyhong.com/finagiwieuvlr.pdfIn PDF document text
    • https://mivatuvogap.weebly.com/uploads/1/3/4/0/134040868/38df71224.pdfIn PDF document text
    • http://mailedflkf.site/7904151288ualsm.pdfIn PDF document text
    • http://presentinsta.online/jomiwenafexafosisa1ajs.pdfIn PDF document text
    • http://cashfree.store/831067162520u9gg.pdfIn PDF document text
    • http://kindraretterath.com/xanazebimanebzj9n.pdfIn PDF document text
    • http://topsalon.xyz/momudibiwaru2yv4o.pdfIn PDF document text
    • http://startbastar.online/cox_contour_guide_optionsfic85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pilazi/27910058643.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/luxapid.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/94710082354.pdfIn PDF document text
    • http://wufuxoponuwuros.epizy.com/12996434832.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 4812 bytes
SHA-256: e7a8d276aae7eb1a34f58ceccd3f4e7e0d99cee269e387be839d10dd0b362b96
font_01_sfnt_off0000d819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 10260 bytes
SHA-256: 4231f2811619ed8b59ccaf4553b95c9772a1590b5d3622c07c0239fc4f5407d1
font_02_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f