Malicious PDF — malware analysis report

Static analysis result for SHA-256 a007538f4c86f63b…

MALICIOUS

PDF

40.0 KB Created: 2020-10-02 00:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 990c90fde246df19c659731d03ba74e6 SHA-1: b14112cf08f9c3aa6d764d76c34bd0e38ad62188 SHA-256: a007538f4c86f63b70d2949101ca4f2d6b0f6507b05a38e521fab3aefca0425e
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=childhood%2527s+end+find+hyperion+rkt+sentry In PDF document text
    • https://site-1039197.mozfiles.com/files/1039197/voxusidizexalobadaxut.pdfIn PDF document text
    • https://site-1036686.mozfiles.com/files/1036686/fukux.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/45505425929.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/63658265013.pdfIn PDF document text
    • http://zawur.wellspringcc.com.au/uploads/1/3/1/4/131453872/bifamodafawi_fuvepox_sazutijofevowir.pdfIn PDF document text
    • http://files.lowcountrydressforsuccess.org/uploads/1/3/2/6/132681824/nulitiveguna_zikufer_pezeme.pdfIn PDF document text
    • http://files.loveblanketproject.org/uploads/1/3/1/3/131384536/4031389.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/1/0483/6242/2421/files/21082177037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/georgia_6th_grade_ela_pacing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2913/1175/files/allavsoft_video_downloader_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/east_mecklenburg_high_school_staff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6594/5493/files/10154271826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0375/6196/files/mutujufifalibu.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_off00006016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6016 5024 bytes
SHA-256: 7aedff0e950496b3038c02d09dd7183fdb91432b6ee2d02029ad36d44f5da597
font_01_sfnt_off00007133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 9920 bytes
SHA-256: 8370ed161d8fcf148a86913fbcbbe0f8aa496173757b9e24a07c4c1ecb4e74c1