Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f6999153faeaf9…

MALICIOUS

PDF

57.5 KB Created: 2020-10-28 16:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 95fcc29a835ac11881ca32af1fc4e527 SHA-1: d15d6cde587336c611abaa8e042e406a7e488402 SHA-256: c3f6999153faeaf98148921ccf144de3f4de9516002193f9b51bdde147b8b424
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?keyword=frost+wedging+dictionary+definition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384045/normal_5f8f2dde8681b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f97be898d9ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f91e1026292d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379849/normal_5f8db89520ff3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/lanuzelesaxamigagifor.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/falla_cardiaca_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6865/2697/files/nagijebenoso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3261956-557f-4502-a9ac-16eb4052b2e2/sanonojukexitemumonet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b980454c-3b89-459d-9f4d-6a8684f59f90/46439408242.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/timomesilisifonikusozejug.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/carcinome_cutan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff98bc3-bba6-440f-8a01-aba086585be3/pezod.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/36502048462.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/nigedexiraripusoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8807cff5-1077-4849-ab24-7eb0d2d917db/dark_souls_3_save_editor_pc_download.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000bb51.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xBB51 18400 bytes
SHA-256: 717799aa003f7f98724110507f953c4c06291329e28fca9c1382b23130f89357
font_00_sfnt_off000067a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A1 2920 bytes
SHA-256: b0299174c4a503e320b47feb2076ca39d607fd604b7dbe3133fcbe6d226edb15
font_01_sfnt_off000071f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 5304 bytes
SHA-256: cc5f380ccfaae019025d66409755b44c4d9f0185aadb5081431d3c89d563578b
font_02_sfnt_off00008433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8433 2108 bytes
SHA-256: e66bd646ff29f48b94a898642357a1d5295b77faffa0bd70eb77acb4aebc9a97
font_03_sfnt_off00008e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0A 15172 bytes
SHA-256: c1bab14c68cdd5a247c75ff99e6fe3ae5231fc91a025a6b21093b2313e1a9672

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