Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d78af2a5f50b38f…

MALICIOUS

PDF

71.9 KB Created: 2021-02-10 06:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 83b087c98dd45f45bdf1376909983979 SHA-1: 4a51bc19cc6e5a548b209a65106be0cb2cde8b13 SHA-256: 6d78af2a5f50b38fe849a83c1a76fc31f216f8a3d4d6a38776631b391f24e99e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=android+play+store+app+icon PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fefa76d42d8a.pdfIn PDF document text
    • http://quickstore.pro/como_transformar_3_arrobas_a_kilogramosy74z4.pdfIn PDF document text
    • http://es50off.pro/dragon_matte_liquid_lipstick_reviewtkd7r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_601425ae33c6e.pdfIn PDF document text
    • https://cdn.sqhk.co/lasotepana/C4mr7hd/real_racing_3_wiki_cars.pdfIn PDF document text
    • http://bighome.space/durusewusibadtpoc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5fc6d8a940041.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/hfidSii/46998461822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fece8618fd9b.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/ghfgcia/nbc_sports_live_stream_free_roku.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/xakajoziwibi/lal_chunariya_mp4_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/dometuwibosukip.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/equality_property_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/wiritixokexokaled.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/84844150435.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_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 5160 bytes
SHA-256: 11498f7b2de7e9cc9c1efb7dd5e443b97b6b9b27f31e51cdc0256666f83147a9
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 10652 bytes
SHA-256: 089ebee366a7c3d4b6fd80b55e8e330e76caaf7a7c2fb296b89c7aaafc9f50f5