Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fa8f0e65ec3764…

MALICIOUS

PDF

65.7 KB Created: 2020-10-15 11:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dbea399321dfd3ee7dab040c65709d67 SHA-1: 4132d87f50c53464ddf629f93dd21880a97468c1 SHA-256: 87fa8f0e65ec37646da4bbb92ad557d7ba3ba103e27d9725ce4e8add05f9e684
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/pify?keyword=cisco+unified+callmanager+security+guide In PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/24538765717.pdfIn PDF document text
    • https://site-1043833.mozfiles.com/files/1043833/44571905738.pdfIn PDF document text
    • https://site-1048224.mozfiles.com/files/1048224/82698847518.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/majije.pdfIn PDF document text
    • https://site-1043798.mozfiles.com/files/1043798/60611778037.pdfIn PDF document text
    • https://site-1043204.mozfiles.com/files/1043204/menividixosoxorox.pdfIn PDF document text
    • https://site-1038879.mozfiles.com/files/1038879/genade.pdfIn PDF document text
    • https://site-1042092.mozfiles.com/files/1042092/79562760400.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/golosumixo.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/2935813.pdfIn PDF document text
    • https://{8443}/ccmadmin/showHome.doIn 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/1/0434/1248/8343/files/troy_bilt_13aj609g766_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/histoire_de_ma_vie_casanova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2874/0258/files/red_queen_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7663/5812/files/13102640771.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0868/7769/files/75097609149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3943/9032/files/13424247801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0776/0311/files/asma_infantil_2020.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_off0000c369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC369 5348 bytes
SHA-256: 9128ca956e4295ca8295aeb52f86ffbad1f16b7b56c4933d5d517a5b6cb4f65b
font_01_sfnt_off0000d582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD582 10508 bytes
SHA-256: 728f81248fb198fc02d6f1b5a8a10d929e6591abe5e864a34bda7cbff3eae52d

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