Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd6d0088b2288bd…

MALICIOUS

PDF

45.3 KB Created: 2020-11-06 06:19:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 362f6eec8ebc01ac7cef5a60a2600c42 SHA-1: d93d6db0917c9a8d88652de7429727ad424c1023 SHA-256: 3cd6d0088b2288bded87072dccadaf7abb3ab68d529ca63ee0c27d1ce527f8db
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://traffking.ru/123?keyword=piecewise+function+equations+calculator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f881e1f864b9.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/tipenubaritisak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375353/normal_5fa0b281a4fda.pdfIn PDF document text
    • https://wuxurabe.weebly.com/uploads/1/3/4/6/134608123/jetatad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/critical_path_buckminster_fuller.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa9ae3d-1e9f-40c2-9954-1c553ce51b64/feregi.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/3_foot_ninja_unblocked_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/39445730679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d618931-fd02-4e37-b101-0890a265e47a/family_feud_rules_when_you_pass.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/happy_wheels_hacked_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5a963c-7474-42ed-a7ba-5e121042cbbd/logitech_headset_wireless.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f57465-d040-4c65-815a-5d48b4484b9d/micromedex_a_senha_livre_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/zulusirokelorezupefegabo.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/dios_del_cielo_crucigrama.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_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 5096 bytes
SHA-256: 05c6b95fe2ecccd53453879abac50746d724a6f1c16383f10905ae704c6f0b98
font_01_sfnt_off0000824c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x824C 11236 bytes
SHA-256: 5100e2bf961dbcd396b7b64feb6472696d8d0db6c747c356717efbc7838f95c0

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