Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a73db212974ea5f…

MALICIOUS

PDF

69.7 KB Created: 2021-03-08 19:18:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 51950b3d55e2a9822e6efc71ad1694ad SHA-1: ed77eaba5aea390f57de70f99dbb338e50a024b3 SHA-256: 6a73db212974ea5fd8b9fadad62d702cd9fc1b9d9433428eaccb12711bd179dc
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=precalculus+with+limits+pdf+7th+edition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5ff65d71a1fb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407303/normal_601b917bb16fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374376/normal_5ffd1d63d866e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5fe7cad718d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5fe8754f92a6a.pdfIn PDF document text
    • https://cdn.sqhk.co/vugujebeku/baBjbXt/lovecraft_s_untold_stories_switch_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/iKigvhi/46587418763.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446019/normal_6001d0c5ceea0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5fcf40ec88608.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/87gc0hc/39658772708.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/ibKhfvV/giwipusal.pdfIn PDF document text
    • http://doucheapp.xyz/quem_paga_imposto_de_renda_em_2019i98c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5ff134f8b3cd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5fe00623dd23a.pdfIn PDF document text
    • http://good-production11.site/genesis_from_genesis_to_revelation_allmusiclpofe.pdfIn PDF document text
    • http://siteznakomstv69.space/366885943441q5go.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_60412c7cb0fd5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26711c6-0b27-4ae8-b619-8916993d7375/bagujemafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29a4b5b-b777-4ec0-8c91-74cf21e41d9a/77872007580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6a7311-7dd2-443e-bde4-649cc1dbc9b0/netgear_dgn2200_default_username_and_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70a1bd3-e2a2-4698-98ef-758c00accecf/4653924092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4869cb63-22db-45b4-95f2-267036f55746/new_maternity_leave_instruction_navy.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_off0000d6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F4 5568 bytes
SHA-256: 0ef53f3a1cd1727318893b75847e57d6b5cc48820fb644237da50ef4e3bd0ccd
font_01_sfnt_off0000e9d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D2 9248 bytes
SHA-256: 44ded4672268400eecf817309b19043510273894b227af953d407a4b4452bd0d

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