Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f9f94db1aac083…

MALICIOUS

PDF

41.0 KB Created: 2020-09-29 22:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b2c9485490893a454b668c7d78f00000 SHA-1: bc96290f4402c9055c7ad2c12ee2383915dd89fc SHA-256: a7f9f94db1aac083481ed8ad6dea6c89c91eb77f72d1ef3f4e5a609801acbb8b
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+casual+vacancy+pdf+espa%25C3%25B1ol In PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/95781985040.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/74991767707.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/bajitew.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/50123807360.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/rowuzal.pdfIn PDF document text
    • http://files.honeybeearts.org/uploads/1/3/0/8/130814492/872676.pdfIn PDF document text
    • http://xalol.mrcampbellsclass.net/uploads/1/3/1/8/131858661/97c077754601f.pdfIn PDF document text
    • http://jekes.lolaobamehinti.com/uploads/1/3/1/4/131483154/9404240.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/1/0429/7831/2355/files/zorovadoxavaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/xiwavopa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6158/3776/files/74273851854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3859/7280/files/android_version_9_encryption.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/33353694479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9299/2410/files/ruduzezadat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7725/0455/files/39069881532.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_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 5468 bytes
SHA-256: 0d3d660cca275f6a4d30b9f94bad597b8bf811c7a6dc40cb2faa3a736caa56e9
font_01_sfnt_off000072ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BA 10088 bytes
SHA-256: 26052e0b5765f8547fb114a5be57aefb61f276db7ef6643e5993f387b9543d12

Open this report in the interactive analyzer, or submit your own file for analysis.