Malicious PDF — malware analysis report

Static analysis result for SHA-256 9272f3eedcbb6f78…

MALICIOUS

PDF

37.1 KB Created: 2020-10-19 02:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 34ce2e1a3ae043a6e6c1111fd0f03b7a SHA-1: a60af2721c3b8fce56ec830d793fe795cae42432 SHA-256: 9272f3eedcbb6f787126a284beec7d54bc9a5ac78259ce34c63014e0de16f2ad
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://cctraff.ru/strik?keyword=scarlet+letter+anticipation+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8863b263b36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f89a91e14a73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f8a4d6eaa3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369762/normal_5f8cb8923cb35.pdfIn PDF document text
    • https://fosogaji.weebly.com/uploads/1/3/1/4/131455903/3420355.pdfIn PDF document text
    • https://folanejo.weebly.com/uploads/1/3/0/7/130776558/4b94c.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/5802a14c0a75.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/a93e1b5c04.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/sky_sports_guide_boxing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8396/5634/files/87078999641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/radiation_island_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/40183300648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3305/8715/files/the_princes_and_the_treasure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a663f971-9f74-4914-9dcb-5e65af7d2b2d/22101678908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1df1a7f-5be9-44cf-98bd-3b98562ad21a/2138712054.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5f5c676-4afd-4692-be12-b66d354d39c6/diagrama_de_pert_ejercicios_resuelto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c127c86a-7284-4638-901e-156376aa1aa9/diguzugavuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fbd78c4-67f5-4e07-96ee-9bd61c4cb6df/35021377114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f648c7-1b3d-48d2-8d58-06e5dc4737d6/empire_of_storms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4caf9ff-5680-47e0-b94a-1ea05b85261e/jifevemobepawaxomiwaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d378bb-f2c0-4ae5-ba4b-f1fb92f27086/52887966328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/rumifujuzifugejunome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1468/3815/files/bliss_kiss_nail_oil.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_off000051d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D5 5164 bytes
SHA-256: a6d555b60a14af43e80a65e7aafb69974bca78288d31d44965fdb7f6baa73bed
font_01_sfnt_off00006362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 10640 bytes
SHA-256: c9ed61a73770156aabdfc4c60e01dd0e7e3364a1baad9fb50babead6ee847265

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