Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c98a401e9cbc071…

MALICIOUS

PDF

80.4 KB Created: 2021-01-20 18:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 61da9bee4153c44c632b2ad9b6726ac1 SHA-1: a83330b192622d780f32860833095523abca614d SHA-256: 9c98a401e9cbc07119421fcb92e4d51a3f08056d4af87b59155b2294f7dad818
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=medial+condyle+of+femur+x+ray PDF link annotation
    • https://site-1166703.mozfiles.com/files/1166703/stack_on_gun_safe_lock_mechanism.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5ff94863c0725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_6003f7bf8863e.pdfIn PDF document text
    • https://site-1191329.mozfiles.com/files/1191329/vovamazusamobirorewodivup.pdfIn PDF document text
    • https://site-1168326.mozfiles.com/files/1168326/sprinkle_islands_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fa84b1168298.pdfIn PDF document text
    • https://site-1177924.mozfiles.com/files/1177924/guide_for_hungry_shark_evolution_2019_ios.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478131/normal_5fc7e8eac384e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f8eab0687472.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5ff91f444a109.pdfIn PDF document text
    • https://cdn.sqhk.co/sabepakofo/eo3NjcF/32183987785.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/aja8hc8/alone_images_girl_crying.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/9A5qofb/wepetojutufabakimuwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489251/normal_60025994d2e56.pdfIn PDF document text
    • https://site-1235125.mozfiles.com/files/1235125/the_little_rascals_full_movie_free.pdfIn PDF document text
    • https://site-1175722.mozfiles.com/files/1175722/seachoice_79901_electric_rope_cutting_gun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385614/normal_600023728e672.pdfIn PDF document text
    • https://site-1197512.mozfiles.com/files/1197512/vegetarian_cannibal_movie_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 5164 bytes
SHA-256: fb54ee17707544211e2ecd0a19f49b54c8637dadb319b2df0fe122ba26061ac4
font_01_sfnt_off00011068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11068 10604 bytes
SHA-256: dda7d5d399116fc47c35e70b91107ed1a44518bd3f6938178175b96b74c51da4

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