Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3d4aeafd32356d…

MALICIOUS

PDF

43.5 KB Created: 2020-10-15 22:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31f44122306034846e89602004595069 SHA-1: 32b41a9e86a9a7861adb064b2601b54a790391e9 SHA-256: 5f3d4aeafd32356d4fab5805123466e7e794af33e3caa4ac48e62f60851e45b8
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/123?keyword=hyper+tough+heavy+duty+staple+gun+instructions In PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/rugutos.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/5ebdd91074a5.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/9247351.pdfIn PDF document text
    • https://dojulukasinu.weebly.com/uploads/1/3/0/7/130776790/puvixerizewatul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f873b0c1aac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f87d940c6bf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f88302a7378c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f875b9fc3c24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f888b6bd653b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f876dc6d41a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8847c897692.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://uploads.strikinglycdn.com/files/d6c56f30-2e19-4d80-afd9-51fd5c55bfa0/64417668184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40233cd1-d7f2-4040-9e83-b147d81ec8a8/fimikonigafira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f9e618-1868-47d6-ba49-5c4ddaf72246/48565103923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a61143d-4bc6-4f59-80ac-05bd32148558/15262902662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/1780237387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4695/2856/files/dolores_cannon_the_custodians.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9191/3632/files/the_only_backpackers_inn_toronto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8881/3461/files/analytic_geometry_and_calculus_1.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_off00005db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB5 5340 bytes
SHA-256: 98ae70c6ac57be0b95623534e12a043dda8f8b22acc288f55b74fac547cc8ff9
font_01_sfnt_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 10052 bytes
SHA-256: 522894fb0aea7e62357333922d514f94ec3709a9da07774ef25f5a67a007c1db
font_02_sfnt_off00009255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9255 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2