Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dcffbaa377119e3…

MALICIOUS

PDF

42.8 KB Created: 2020-10-05 02:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7cf89cbfb69081dbc4bea530fe3d7039 SHA-1: bef64d09c81109cbf0bd24dbabbddd8ac09af960 SHA-256: 0dcffbaa377119e3bf64ed2c0f502b4153c29caf5b802fba0ac3014cb9699987
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=12th+hsc+english+writing+skills+pdf In PDF document text
    • https://site-1037911.mozfiles.com/files/1037911/gaxetulopixijokimesi.pdfIn PDF document text
    • http://fopeje.robinapplepeopleshots.com/uploads/1/3/1/8/131857204/jibega.pdfIn PDF document text
    • http://files.hemetwestvalleyffa.org/uploads/1/3/0/7/130739719/bokewofidowirej.pdfIn PDF document text
    • http://kolusiz.robertbolger.com/uploads/1/3/1/0/131069898/1267746.pdfIn PDF document text
    • http://files.marissaworks.com/uploads/1/3/2/7/132740423/2233216.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/1aa21a4d-18c5-431c-8fba-31fc979bdbfe/xipafezenumerafeliku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ce9ebe-34a1-4cc2-b438-1eccfd827b89/gogawadif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fdc55fb-7e53-4d55-bdf7-2223b1c93e6c/52836668440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3617e81b-752c-4adc-8b88-288189ae01b0/rorugelokali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db4f30f-60a2-433a-b8a2-2f92a77deabe/45555939618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/mififalofarabamunosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/58515489650.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_off00005d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D50 5128 bytes
SHA-256: 5dd929eac16e63ad0b738d4139a7006ca0ee2e26747b0670ac64c21bdc5fea2e
font_01_sfnt_off00006ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC1 9916 bytes
SHA-256: 0c5accf4cfeee5ec18105848e7c9a770c67e5714789bfab10b62e7538fdc2e9e
font_02_sfnt_off00009065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9065 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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