Malicious PDF — malware analysis report

Static analysis result for SHA-256 0478bf40fc101bf9…

MALICIOUS

PDF

45.9 KB Created: 2020-10-25 10:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-10
MD5: 26c2893af5ee12dcf44a5dddf3eeee4c SHA-1: 688649919743c5f0dd949d49607c131d6e0e3d8a SHA-256: 0478bf40fc101bf9c63d3ed4c182ff865576f43a43b16e197746e50b21d91b6f
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://ttraff.com/aws?keyword=casio+warranty+card+pdf In PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/fogobifadezofani.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/widef-xilajuzet-wisogafit.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/dojagamugofowi.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/doteta.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/biride.pdfIn PDF document text
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/sidebuwoku.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/3373854.pdfIn PDF document text
    • https://funiwulew.weebly.com/uploads/1/3/2/8/132814073/disebonokotidamewu.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/vupagepotite.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/391582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f8730ccb333b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8e92ed56154.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007435.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007435.bin)
    • https://uploads.strikinglycdn.com/files/b55d0116-5c41-4f07-bd71-10661e414cd9/47870996924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acff13dd-1f36-43dd-835f-5700e2b26123/dalaveravokejejavotik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf61704-3915-4f9f-8a00-7f6bc6498734/zisetutakododib.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/kaninuludetezozevuvuwaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/tejak.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/forensic_psychology_case_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/wexofokotilaki.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/nigosegekibasu.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/guia_mundial_de_biomagnetismo.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/inductive_load_and_capacitive_load.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/class_12_chemistry_important_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/apostle_johnson_suleman_books_download.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 extracted file (font_00_sfnt_off00007435.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 5216 bytes
SHA-256: e32e7dad878c5d6f0c45203918eae260362edbed6392ff951b4371fc831e2b81
font_01_sfnt_off00008619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8619 10616 bytes
SHA-256: 3fc33c3fe35011fc59b64d074cf2584fb50ad7429585119151b079e022c20e1b