Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0daf2fe4f4ae14…

MALICIOUS

PDF

47.6 KB Created: 2020-10-25 15:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 69bc8e74ccbde3e14d33d84db1476052 SHA-1: d6345e8465aaa0d996760c4178adaa00cc70c761 SHA-256: fd0daf2fe4f4ae141ed6545c5286e3bb6ec25da2323204eedf90ef1a2f5bced3
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://ggtraff.ru/123?keyword=epoccam+pro+apk+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369773/normal_5f88487aea75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5f9238284c3d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_5f8fdafc85528.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8e01c671f62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387821/normal_5f9307f890156.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/bfbc7bb65d1c2.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/kobopas_tawerelibifajeg_rukid_vuvuwafokesim.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/69891e21773f2.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/pesonotagada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8c526fd614b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365601/normal_5f889ad6d2b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384817/normal_5f9450907bd7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f8df4d02bd39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f8b98f652408.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/1/0496/0527/9911/files/commodity_trading_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1372/9187/files/samsung_tablet_sm_t350_screen_replacement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8171/files/muscle_anatomy_atlas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e21f67-8ae7-45ef-88f5-eb59d3d75d3e/16831194195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d844a91-d954-40c1-9f5a-6b3bcfbe79c4/jomiwukaxovuvezaborewuku.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6743 5028 bytes
SHA-256: 3979a9ed0b802b35e952bf2233d0b82b93b9defe393163ce6ea7ad6905789b87
font_01_sfnt_off0000783e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 10404 bytes
SHA-256: fa2ffa784deb164e6b63d710aa447947c6fb62f7d0e3f56415c6962067ecc28d
font_02_sfnt_off00009c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C2A 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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