Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e054b7d064c6648…

MALICIOUS

PDF

44.0 KB Created: 2020-10-15 06:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 1cec8ce3264a013004a5fc1c0507a837 SHA-1: f5822052820b53557a331ebbd746c8a1f7e3a41b SHA-256: 4e054b7d064c6648ffcd0769bf32628a3e08f686b54ba4a4f85fc760df4ec328
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/123?keyword=android+box+apps+2020 In PDF document text
    • https://fekudumubaf.weebly.com/uploads/1/3/2/6/132681201/lilitifaxifasesijex.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/ponime.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f86f4bdb2dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f86f67cc8f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8752fda3a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f87721e9df4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8754118ca61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f87829332de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f871bcc7c674.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f8705e46cc71.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/1/0266/8337/5786/files/36327266948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0370/6006/files/jagofawedodewile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5397/2633/files/gretchen_am_spinnrade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7580/6391/files/petedigovafomekedofema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6985/2833/files/nufodotajaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2632/5409/files/zip_code_for_tallahassee_fla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7347/7052/files/mitowowopalosajuguleti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/rojisivux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6880/0155/files/dayz_guide_to_base_building.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_off00006cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 5392 bytes
SHA-256: 5332d0ba47be21cfd79d18dda74eee9fba7ce3d070e749e83907d747756f974b
font_01_sfnt_off00007f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0B 10412 bytes
SHA-256: 6db3dda610016a7ec308c0a97846984a293a5609b8934a73e855697bdf85ec14