Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dc971ba2428399…

MALICIOUS

PDF

46.8 KB Created: 2020-10-16 11:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a08b55c1e016332b62be6416272bf2c9 SHA-1: ba21704a9b8e4cfa9d111d150981b43ec0e712d3 SHA-256: c0dc971ba2428399fa9efc4348fdc72947fa93e102946e96274c7ebb38fe66a2
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=spotify+android+tv+screensaver In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/7414141.pdfIn PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/b281f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f86ffd811937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f87168a8cdd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f8749958816c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f88fb5d24c85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8765d1963b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373519/normal_5f89067ddcfda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_5f882215b9a2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87418819f0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f86f63942934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f8864f036bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f891be7ade55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f881ea92127a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87118b6380d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f875e59c4d5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f88cfc13d355.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/44a761ba-d285-48bd-9055-78d6a46a3b4e/83038530768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6c1f5f-fc25-45f4-b7bd-a6e2d43acc36/kefole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7086/5575/files/kavisimoxosivepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/sb_game_hacker_apk_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4831/2217/files/kujena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9666/0886/files/i_am_statements_in_john.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/devozimepu.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_off000075cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 5380 bytes
SHA-256: 9e60b5c645dc46a5df100caa7df2565f5968bce0da8db4d7577e6ec98ee57e4b
font_01_sfnt_off0000882a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882A 11268 bytes
SHA-256: aa05950ebd698e3f73eb22a85c4cb37ef350c1f2d2f4312f2cabede19750bca4

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