Malicious PDF — malware analysis report

Static analysis result for SHA-256 74600d33fb6fd81e…

MALICIOUS

PDF

54.2 KB Created: 2020-11-06 23:32:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 053e32a804e794ec05b17a3a834fe2d0 SHA-1: dc3caa7c11391366a7c2b01765155a2d7da5e6f1 SHA-256: 74600d33fb6fd81e6e7f2b868bed6d24ed9165331b9eeff666e2fc6b5974b0c3
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://trafffi.ru/aws?keyword=third+person+objective+and+omniscient In PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/0d1ddc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007615.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007615.bin)
    • https://uploads.strikinglycdn.com/files/397fd864-6f06-4e23-8404-212a895c2535/fosakamujabaza.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5845edf5-0866-41f0-9e61-dc391775c068/kibixudegutupos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/259e8ea9-b37f-4d8b-982c-280f176d30c5/dunemola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f196fb9d-f9d6-402c-87c3-1a3c68bfd3db/nowipozezewevedosela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5080e5-6190-4fc9-be34-00cbdf642822/blue_ocean_52_shower_panel_tower_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575bb04c-5c97-44e2-aeb2-31686af3786d/54236289603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fb9c372-bd95-40f7-a626-74cd191e0bcc/93945508632.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/63403236340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256e2ff2-cd62-445f-81c2-84280cc91f56/46484919885.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://dejavu.sourceforge.netIn extracted file (stream_006_off0000ac46.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_006_off0000ac46.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00007615.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ac46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC46 18820 bytes
SHA-256: f5d5f8886537c1ddba65ba020819795c6a18d1d31c272d41c69bc73d1ca97ed3
font_00_sfnt_off00007615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 5504 bytes
SHA-256: cc9814c2d0c9867829b6d85d02674c19ac84fce50b20bda12297a5c6399d0a2d
font_01_sfnt_off000088aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AA 10364 bytes
SHA-256: 01017878f8782990fb081fc09fc10fb5111347614cad1180cec84ad53ccc4abf

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