Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bf4ae8f216813d…

MALICIOUS

PDF

72.0 KB Created: 2021-02-27 00:20:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ff1ba087282e4410a87b7ff5de74bf6d SHA-1: 075680f7c29aadc4303014293920fd202a3c0484 SHA-256: 73bf4ae8f216813d23305e5390f66b409be5bdfff156ff58eca94c1f44e41bf8
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://kuzutuzo.ru/wb?keyword=what%20was%20greek%20mythology PDF link annotation
    • https://cdn.sqhk.co/wemorapi/jahjigD/first_three_words_of_the_bible.pdfIn PDF document text
    • https://cdn.sqhk.co/fudikeraz/IU9giGE/color_wheel_artwork.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/ehgDieR/play_hearts_online_247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_600c4af3ee7a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fd7bb2640f80.pdfIn PDF document text
    • https://cdn.sqhk.co/joxonorapa/uhgSBja/cats_crash_arena_turbo_stars_games.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/1id7hbL/supanogezowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380403/normal_60018ad8e115d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_601981c326fa7.pdfIn PDF document text
    • https://fetavagipiw.weebly.com/uploads/1/3/1/3/131380759/bifofexerowuladokego.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/26390441942.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/hbhjICU/craigslist_sf_free_stuff_east_bay.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/uMwhgXa/98739737458.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/5951985.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/tixeligufokup/14921678115.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_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 5372 bytes
SHA-256: 07c7c78ca3874c7901ecab54e230e975b0155c03c4186afccf55c6e045765d8f
font_01_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 10544 bytes
SHA-256: bb59fa89942748cc2c0e66890847888c046b879aa542956826e01741a351bc7c