Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a21c03e6100eaa…

MALICIOUS

PDF

72.3 KB Created: 2021-01-28 14:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 938520b738eae7f4850883e0aeede0dd SHA-1: a0a3d0b7755399732cc16791120da6b8c439c32e SHA-256: 25a21c03e6100eaabb3f500992fb1641a5f1537039a887e798bc7ce1686ccdd3
152 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=bcece+2020+application+form+date PDF link annotation
    • https://cdn.sqhk.co/joxomawezu/Ijhhcdg/75629598118.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/jmigggK/dr_driving_game_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365591/normal_5feef9b1edb09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500450/normal_60091dd4dbdc3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fe0a77d00188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404730/normal_600a6659e527b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_600ab28e0d162.pdfIn PDF document text
    • http://barcaporirternet-interbank-pe.com/heisig_kanji_listhcgcb.pdfIn PDF document text
    • http://hookup157.site/on_love_by_alain_de_bottonoso4y.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/gqjbJia/siberian_husky_price_puppy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485705/normal_60081a194e5e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_6012307c734cf.pdfIn PDF document text
    • http://netewe8.xyz/ignou_anthropology_study_material_freee5kk8.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxawexa/c5hbhew/zesoxudojumamugatibof.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/muvevanepen/parse_json_array_in_java_android.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_off0000dd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD48 5448 bytes
SHA-256: 468c613562b3afae8753aaf8531986ab8af958dd5b1e6c4e15ce53c320820322
font_01_sfnt_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10740 bytes
SHA-256: ad288cbe68d4a4ca5632d7ce6fb794bf990ca62cc5a8e7a966cf11c158df7f67

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