Malicious PDF — malware analysis report

Static analysis result for SHA-256 5739ac70c55dc0f5…

MALICIOUS

PDF

45.7 KB Created: 2020-10-09 12:35:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7f48d308875e6a58b3d9b2ee5b1d17a6 SHA-1: b94702391866cafae121604a086f2ab8aca5facb SHA-256: 5739ac70c55dc0f5eba5de9fb6b67885d4a08f12abf0c191a66030f1e6947164
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/pify?keyword=shape+of+molecules+chart In PDF document text
    • https://site-1038710.mozfiles.com/files/1038710/votozafifux.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/29578840702.pdfIn PDF document text
    • https://site-1036678.mozfiles.com/files/1036678/babilapobenagajesovim.pdfIn PDF document text
    • https://site-1039560.mozfiles.com/files/1039560/nejivok.pdfIn PDF document text
    • http://files.tetcommunity.com/uploads/1/3/1/6/131636769/bovoxa.pdfIn PDF document text
    • http://xivag.haciendagrill.net/uploads/1/3/1/3/131383548/5983224.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/15234bd8-4c1b-43f6-bcda-3fc504791fe9/75784107653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/945a36f5-b5cc-4b4f-b72c-9a5c4bfd9d2f/26749949047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f8f16b-c4db-4772-9f8f-0417940acfd9/36641388666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8ee1823-d1a5-4bc4-afe8-2f00410b8c22/jufabugemijofujisalezujuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0414/6076/files/closer_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3827/2419/files/waxikajere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8608/8865/files/99420548753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/bogasufevuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/crime_scene_basics_worksheet_2.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_off000072a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A5 5356 bytes
SHA-256: e89358a6d98e5863a43ccd7adb59c06ad1ff2c7bef365f752351f1847c1167fe
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 10808 bytes
SHA-256: 4fcd3c5f19ce75057a00f1375b6c9fc392a834b985d6023ffdf8850ee7a21da5

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