Malicious PDF — malware analysis report

Static analysis result for SHA-256 0419596f71882883…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 06:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 45812dd58466d0798ac6de877e5ce5ef SHA-1: 6240d8b123948a4aae1ee11e945b0862c878926b SHA-256: 0419596f7188288315c49aa4f2e06b040ec432909a4e2250f5777e44f0436c7b
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://ttraff.ru/pify?keyword=chuy%25E1%25BB%2583n+%25C4%2591%25E1%25BB%2595i+t%25E1%25BB%25AB+pdf+sang+file+%25E1%25BA%25A3nh In PDF document text
    • http://files.sorcerersatchel.com/uploads/1/3/1/3/131383657/kanaxe.pdfIn PDF document text
    • http://files.lincolnconcretenpaving.com/uploads/1/3/0/7/130739303/6260333.pdfIn PDF document text
    • http://zarufenu.debbiesangelsproductions.com/uploads/1/3/1/4/131453206/7729057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/37829504248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/togujikadeluvejutixenare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/easy_way_to_learn_python_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2480/0151/files/20038733353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/kogepuwipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3808/3994/files/sadol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5760/8864/files/kakegotadeliro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/15924440662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/spoken_english_offline_app_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/clases_de_enlaces_quimicos_y_ejemplos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000550c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x550C 6092 bytes
SHA-256: 4923a378b1383db562e461dd1a33f877a17a067311ae8c95501c4bcf04c4275c
font_01_sfnt_off00006894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6894 10044 bytes
SHA-256: 719c84ce8753e3bf498c2736ad1c0edd651278104b77b3b8dbbf5f48644afd71
font_02_sfnt_off00008aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AEF 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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