Malicious PDF — malware analysis report

Static analysis result for SHA-256 44840c3bb04c8e50…

MALICIOUS

PDF

44.7 KB Created: 2020-10-05 23:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 06f71bbb4a5bde4c72e7b3ae52af2b4e SHA-1: 70fbee53c8e8dc8d062d28fcb7d636d97bc55124 SHA-256: 44840c3bb04c8e50a822dce6f7d2ca0058188cab18f0961fab1ca3600f0e5ecb
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=toyota+rav4+alternator+wiring+diagram In PDF document text
    • http://nivove.alldogkind.com/uploads/1/3/1/8/131856713/9148304.pdfIn PDF document text
    • http://jikukamav.fmemc.org/uploads/1/3/0/9/130969686/wobava_gezuxukixujesef_jabazefolokun.pdfIn PDF document text
    • http://nupaxewix.aroundtheworldin800days.com/uploads/1/3/2/6/132696111/rotoweser_wukezixifupev_wufikixekapu.pdfIn PDF document text
    • http://jebagaz.coltonfoushee.com/uploads/1/3/1/4/131438464/beroxuka-zobibamozo-watelalimamerag.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/a0fae44d-c8f5-49e6-be2d-89b8b8a33842/94751367756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/525b2c2e-a7fa-45bf-8509-901400d68e31/36613020438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38ca5b1-d84d-4ea1-9783-88fdf1c2ae8e/mulakazibopitigenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e198c67-b4b5-496c-9ce7-ba05996c7260/sezilopuleni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c82c5fb-6130-40bf-8b9c-fbcaf13c61ac/12860573946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b5b47e5-400d-408f-bafd-5e4d8322cff1/xomalabubemu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb269fda-2412-416f-9cca-38051d42204e/30393730331.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_off000066f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 5260 bytes
SHA-256: 1f33b1617550003401267b5acf45b12f7b1d5212c758a3734aab1ce9e1da4e3b
font_01_sfnt_off000078e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E2 14632 bytes
SHA-256: 078639e51ceac6a4c71a39d3bcb7cc13f094529411397319c922f5be72a85bef