Malicious PDF — malware analysis report

Static analysis result for SHA-256 94cde0c4a0f59eb8…

MALICIOUS

PDF

45.8 KB Created: 2020-10-08 23:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 400022adcab0152525fbcc18f411837d SHA-1: 77a55ad56b850f81edc7c11f61659ec079972d4d SHA-256: 94cde0c4a0f59eb84c74ec6b614b00c19eac1b393b593aeb7a3af2b2b00471ce
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://ggtraff.ru/strik?keyword=simile+and+metaphor+lesson+plan+pdf In PDF document text
    • http://segisurid.arielmeylanart.com/uploads/1/3/1/6/131637131/zikiz-pekokigaz-winesinok.pdfIn PDF document text
    • http://files.ivnmarketing.com/uploads/1/3/1/3/131383242/01bc936cd.pdfIn PDF document text
    • http://gabixisef.getacuity.org/uploads/1/3/1/4/131414743/motuwewajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b305529e-6293-43cd-8b94-b967d182d58e/jotonabufiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1218bf37-0f78-4b6b-910c-7caf1bc55b6b/berolitiwinadebezobes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ea38eb9-54a2-4b98-b859-401a63856126/xepojuxijow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1b60c8-f90c-42a4-bdbe-99664484f5f3/tixilirexagezogojisoraji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038afa63-2002-4b56-a4e9-6c3bb79ee583/76521588126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3696/2716/files/36745426014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1246/7106/files/36592654141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9950/3254/files/kingdom_rush_hacksaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/turonikevise.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_off000074e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E6 5384 bytes
SHA-256: df39545961ba6a75c9e36ed5eba1700ac0caea523828fb3d5fe52f409d1d25a0
font_01_sfnt_off00008702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8702 10508 bytes
SHA-256: e076bece40223545ab387fd6c6d5363e5072c6b44f5a5db4d3f9a3142e41444c