Malicious PDF — malware analysis report

Static analysis result for SHA-256 58e84458d7d2c341…

MALICIOUS

PDF

47.8 KB Created: 2020-10-17 10:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9f7e3f1d45ce3181ab943eb30d6d9c75 SHA-1: 401eae8096ce58822fcd718c74dfdbd44dad7fb9 SHA-256: 58e84458d7d2c341563690b1d00c5dc899f1c0c1730f6c92c99d4645ce1a6195
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=the+grapes+of+wrath+spark+notes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f8a805dc45a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f88b5abe267a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5f8a959287970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f89a655c0b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5f8a1c36845a9.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/muvuvujulatibor.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/segetirib_butaregogomej.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.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/1/0428/5094/3142/files/28525243183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kingroot_v_4.0_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/8077/7373/files/crossy_road_unblocked_6969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3655/9528/files/social_studies_book_4th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/stickman_games_unblocked_77.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5008/1690/files/86511013371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7542/0327/files/votobelabekexezika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7598/6116/files/joteluvujuselosetokede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8386/5506/files/96900792451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3896/0547/files/jcb_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a99990-bae5-4cb3-a4e6-129e221891cc/90737733349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437947f5-114a-459d-8a5b-0aaf5a84ab26/lebunikonijoloxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6679cc-5376-446e-820b-d5ef2cd6caf4/49209840997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20736687-3724-4f62-acd8-9d5702331e61/fegoxibedenulabax.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_off00007e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E20 5236 bytes
SHA-256: 02d4b3bb45e1f6d4727e84e976cbf80ae75e04463fbbba2debcd622fa78ae525
font_01_sfnt_off00009002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9002 9760 bytes
SHA-256: 66fdfff5a359c14ddc87dd40c2e4e08d14ede8ea4fbc26f9ecb5d1b5be1f25a7

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