Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2e76135f9c9bb8…

MALICIOUS

PDF

41.2 KB Created: 2020-10-06 17:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 544df566887cdf06e1e48677736cafc4 SHA-1: 58716c8369625cb57c48010c5c2ff10ded47c42b SHA-256: 9a2e76135f9c9bb875e46c11510785ac5a4ffbb66acc5c20b89b3d72ba8bfa30
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=x-+force+keygen+autocad+2014+64+bit In PDF document text
    • http://zoliw.sinagprintingpress.com/uploads/1/3/1/3/131384721/cee97.pdfIn PDF document text
    • http://files.instituteforbiblicalauthority.org/uploads/1/3/1/4/131438439/bolatutitabigal.pdfIn PDF document text
    • http://gadawa.biblicalintensives.com/uploads/1/3/1/1/131163717/suxinoba.pdfIn PDF document text
    • http://files.michellelashier.com/uploads/1/3/1/3/131380354/kefukiriw-benonesu-kolaxu.pdfIn PDF document text
    • http://lamos.cacnj.org/uploads/1/3/1/4/131483468/b74bf0d7f1.pdfIn PDF document text
    • https://site-1039777.mozfiles.com/files/1039777/67755431847.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/sapetuwojekike.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/45458320874.pdfIn PDF document text
    • https://site-1040037.mozfiles.com/files/1040037/45725369267.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/1/0437/9400/6177/files/libro_las_recetas_de_sascha_fitness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/1014/5694/files/babisuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7688/8992/files/zosenopage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6544/1445/files/lekesegepenuditesukubelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3894/3643/files/17670177073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04275d98-75b6-443b-b31b-c43e818d4d1e/tekagufubodanaletibugeku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7a5d9f-e300-4195-9204-214e4adcfe2f/43043554208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee3218a-4f57-4f13-89c6-bd7b3bb6cb91/fokezemuketez.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_off00005fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCE 5860 bytes
SHA-256: 6287d421339c53b4704046bf789f3620de2344956ad98f7d76a6c82d17f51b4b
font_01_sfnt_off000073ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EA 10792 bytes
SHA-256: 8659e89a50b95dbb8753ef0b7a1788543bb65a31b87c905fa3fa25b39b8eee7b

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