Malicious PDF — malware analysis report

Static analysis result for SHA-256 17d323e76e91bae2…

MALICIOUS

PDF

41.5 KB Created: 2020-10-07 21:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8e0a74a17644f7d45805c42156fcee4e SHA-1: e40ee46de3acd07b9d1bbe402c4a7d26006df58b SHA-256: 17d323e76e91bae2d7f069946b6d11430173f51cb9abfe8d03a6efa99882e72a
242 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gettraff.ru/strik?keyword=find+out+gmail+password+on+android+phone In PDF document text
    • https://site-1037840.mozfiles.com/files/1037840/dirotometivakub.pdfIn PDF document text
    • https://site-1048576.mozfiles.com/files/1048576/pufeliwebidigepezojug.pdfIn PDF document text
    • https://site-1038863.mozfiles.com/files/1038863/25902710988.pdfIn PDF document text
    • https://site-1040129.mozfiles.com/files/1040129/48761305648.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/8927021945.pdfIn PDF document text
    • https://site-1040008.mozfiles.com/files/1040008/91111814176.pdfIn PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/lejugudeloxeki.pdfIn PDF document text
    • https://site-1039702.mozfiles.com/files/1039702/netegesolidubexode.pdfIn PDF document text
    • https://site-1037196.mozfiles.com/files/1037196/mixafefeti.pdfIn PDF document text
    • http://files.academyoffootballaustralia.com/uploads/1/3/0/7/130739697/fevolugu_xukev.pdfIn PDF document text
    • http://files.squareonegoodsco.com/uploads/1/3/2/8/132815154/tasawaz.pdfIn PDF document text
    • http://xalegak.layagsug.com/uploads/1/3/2/6/132695601/1846340.pdfIn PDF document text
    • http://sixuro.marinamarinaantiques.com/uploads/1/3/1/4/131408854/c9240cb2.pdfIn PDF document text
    • http://files.belizeanstudies.com/uploads/1/3/0/7/130739616/mutubed.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/1/0480/9703/4403/files/lizurotexudov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0030/1221/files/mezum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/crescent_valley_high_school_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3825/6535/files/56788327891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6217/7175/files/bitunim.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_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 5420 bytes
SHA-256: 5482e6a512111e15851a24b9543dd76c246f79561e20f8483483268a6c917580
font_01_sfnt_off00007515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7515 10420 bytes
SHA-256: 0d61014e9e4e272d3c9c9d5e117af615a297ff3de1d75c12cbd80ac7df6c3db5