Malicious PDF — malware analysis report

Static analysis result for SHA-256 113a7d43601a2e5a…

MALICIOUS

PDF

68.0 KB Created: 2021-02-12 17:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f55f6e7b4e07e263c13de77b818f1c3b SHA-1: d54ed08b8a4c9f36c46bc8b371dea6d09f83ef21 SHA-256: 113a7d43601a2e5a7a9cfe190e35849449d4a6f8194299f7881a22f79a0304c0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=manual+de+merck+booksmedicos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5fdacfdac844d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600f5cbe7f87f.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jfgfYjf/dune_buggy_game_unblocked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_5fd9ba8d86bff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454561/normal_6011de091c43e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402481/normal_6010565b77202.pdfIn PDF document text
    • https://cdn.sqhk.co/xolilipedeko/hciiCVA/craftsman_house_numbers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495846/normal_5fc7f677478de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_601299f83c18b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491669/normal_5fc9c0178ff4b.pdfIn PDF document text
    • https://cdn.sqhk.co/gaximeme/dM3T3Gj/sokufed.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/g8Ridgi/19197341910.pdfIn PDF document text
    • http://xifelaseb.22web.org/internship_report_sample_for_mba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393635/normal_5fef014a033d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_6011b874dfeaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_60173853cc53c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495065/normal_5ff77653172cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488570/normal_5fcb73214a2b3.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
    • http://vukilef.rf.gd/general_cover_letter_for_resume_template.pdfIn PDF document text
    • http://fijazuzid.rf.gd/jenulusifurezanaloda.pdfIn PDF document text
    • http://fapibudu.epizy.com/vakinovomudutotutodisoji.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_off0000c40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40C 5096 bytes
SHA-256: 054ce70b9df7ad7259e8dab5c776658dd88abd1d67ecb1951e92beaa8d1e28fa
font_01_sfnt_off0000d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 9224 bytes
SHA-256: 4cb713ca9f27ec7970702d3e3104d02bdd7fb4c02edaa9cdee11f4338e15a259
font_02_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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