Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9da190663fe3e88…

MALICIOUS

PDF

82.3 KB Created: 2021-02-07 12:47:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6926c396d94b9c4d5503daed4e4ab37e SHA-1: 4fd72377bc9e091468917ce2215afaf7d5a3f737 SHA-256: a9da190663fe3e88b3fdee2643219d004fd9debc3613df305ec717c26485a4af
136 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
  • 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://jottigo.ru/wb?keyword=cisco%20anyconnect%20vpn%20for%20linux PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464532/normal_5fe317b063b4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485943/normal_5fce69f270892.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/26635434219.pdfIn PDF document text
    • http://gifipagi.22web.org/8687064014.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5fdf90b1ca1bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485305/normal_5ff3b57c075f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450506/normal_5fee648509867.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/djbhcHR/download_gun_master_2_mod_apk.pdfIn PDF document text
    • http://familyit.pro/87042139342bjm7m.pdfIn PDF document text
    • http://dawavuwera.22web.org/interrogative_sentences_worksheets_with_answers.pdfIn PDF document text
    • http://podarokinsta.online/gumagerapalamuxutevauwcl8.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/wofaxil/65230800787.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/gestational_diabetes_ada_guidelines.pdfIn PDF document text
    • http://tuvatopuvonu.epizy.com/ccs_medical_attendance_rules_1944.pdfIn PDF document text
    • http://xofiketur.rf.gd/52681741296.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_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 5144 bytes
SHA-256: 2239e884424b03500f65aaa4fd461e768036c63abce65b64729637c6e8e01d4c
font_01_sfnt_off0001134b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134B 12696 bytes
SHA-256: 5a4b2f9aba15fdcb42cac004f1f450f60d0bee58107b5770060ca1556b69783a