Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4426bbb536b362…

MALICIOUS

PDF

46.3 KB Created: 2020-10-05 10:25:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a4851c3af6f160ec931e8d41c6715190 SHA-1: 31bbbc7a5b173ad4a839f13c1df07dc45ac7318a SHA-256: 9b4426bbb536b3626c99de7beb5b3b31a28a52d25a53787e0faa0808b00b3262
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=pr%25C3%25A9cis+d+anesth%25C3%25A9sie+cardiaque In PDF document text
    • http://files.thestudiosatfshh.com/uploads/1/3/2/6/132682070/tejeguferal.pdfIn PDF document text
    • http://satakubes.covered19masks.com/uploads/1/3/0/9/130969060/9a6b41f.pdfIn PDF document text
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdfIn PDF document text
    • http://gewisode.whartontrust.org/uploads/1/3/0/8/130873872/dac0c04c70922b7.pdfIn PDF document text
    • http://budan.alteredlifestyle.com/uploads/1/3/1/8/131856713/5643687.pdfIn PDF document text
    • http://files.merchantsmrkt.com/uploads/1/3/1/4/131438439/xijubezeboko_xogid_vukedogikefadud.pdfIn PDF document text
    • http://files.lashombspomeranians.com/uploads/1/3/1/4/131437293/2312266.pdfIn PDF document text
    • http://subojowad.coloniachapel.com/uploads/1/3/0/9/130969114/a92d60aa8161.pdfIn PDF document text
    • http://muxolatex.balancebodyandsole.com/uploads/1/3/0/7/130775850/tudotajutuwiniw_jemebat_pukabakefadarod.pdfIn PDF document text
    • https://site-1038517.mozfiles.com/files/1038517/sijifijerikofimuji.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/pipawum.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/1221455408.pdfIn PDF document text
    • https://site-1038475.mozfiles.com/files/1038475/85335442737.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/1/0499/4524/7912/files/driveway_sealer_brush_home_depot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5370/7175/files/fundamental_of_ecology_odum_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/0663/1325/files/52700705853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7827/7527/files/nuclear_power_factorio_ratios.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_off000071de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5264 bytes
SHA-256: 138a6102f270390fababaea3b16f4f652ff78e0400422cd5cfb66ef28548bff3
font_01_sfnt_off00008375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 12220 bytes
SHA-256: b92138e49c1e4378601d50e0c4b87d938af8166c8554edae62034d268fb4a9a7

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