Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad46bd5c2d853f51…

MALICIOUS

PDF

48.7 KB Created: 2020-11-01 05:38:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5d2df0d6feb7c37bddf0e80f07032331 SHA-1: 2e4b3ad84d469cbe6902754f8ced1edda5d897ae SHA-256: ad46bd5c2d853f51c36fb9f245a6843f08cf6066e35d82e641a142177768b746
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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.
  • 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/aws?keyword=fanuc+macro+programming+examples+pdf In PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/sinoxas-nurus-juzizaga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazovugal/acceptable_i9_documents.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/capacity_to_contract_indian_contract_act.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/st._peter_school_jefferson_city_missouri.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/pinibabek.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/auld_triangle_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515a9bb5-9180-43c2-b118-ffbc3f01b085/mijuw.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/67455249591.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/6762265855.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/snow_glass_apples_neil_gaiman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b0ed80-43be-47aa-b8a2-e420725a63dd/25298311711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19231c1-24c6-4eed-9f53-40007325d89d/fapobowa.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/kubota_bx2200_workshop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/85765480713.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 3076 bytes
SHA-256: 6417ca4690cc419a63f17a5e7f03b85a67d585344abdfac5a27f4faedcfb2bd9
font_01_sfnt_off00007ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE8 5496 bytes
SHA-256: 721fbc47708dc6454ab9792840789dd7d618e82cd7658531fef07881821a81a4
font_02_sfnt_off00008d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 12020 bytes
SHA-256: e17fafff51c48614bb959fb1b48a4075b2df77843ee1f7db61975d64fc4381f0

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