Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf87856b2ad9bbfe…

MALICIOUS

PDF

75.2 KB Created: 2021-02-07 19:31:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 10c43b0c8815a43afec20cc81ca2d993 SHA-1: 412c3516ef937b5a8be35851b9ba0f0bad7cb4ab SHA-256: bf87856b2ad9bbfea431edd25ba761c1c779712b676c4640d2728423e82c1303
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://maypoin.ru/123?utm_term=salt+fat+acid+heat+cookbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366661/normal_5fec4f0d32baa.pdfIn PDF document text
    • http://artemk.ru/multi_stream_recycling8qyvb.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/gjc1hda/86510818825.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/dDiaijX/30751469377.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/chaje1f/tefojomokenomiridawawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410976/normal_5fc91ccf8828e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5feea15f21a7c.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/3779457690p6or3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_601fa39219954.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/ajdijig/subway_cat_escape_kitty_run_road.pdfIn PDF document text
    • http://dhl-order.info/17367153960o4m8h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381788/normal_6005c1a9119c2.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/mivokozibu/boletin_informativo_escolar_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/xupuzakavamokufujuwosug.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/26882744346.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_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 5276 bytes
SHA-256: 8e000944efcd8a26eaa46f8a943cbdd74bd3fb38bab532f05e1d944e70cf3329
font_01_sfnt_off0000fcb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB6 10388 bytes
SHA-256: f03f9648976f7f8db73a3c525f766a5e488b1c2394e45a701f288632a44c78cf