Malicious PDF — malware analysis report

Static analysis result for SHA-256 75d6a1d60937ee38…

MALICIOUS

PDF

120.3 KB Created: 2020-11-18 05:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 485ca89f6a6bfa336ee4f93e9ab28ffc SHA-1: 68c2a23972067b09776bbc1abf8a828d8ad1e8b6 SHA-256: 75d6a1d60937ee38ee7a2ddba7e5aef897ce1ce21bf6ce0ed9040986b7b2178a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/123?utm_term=comida+tipica+de+mexico+tacos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5f9f7f79c6bca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_5fb2dd5615f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419827/normal_5f9ea81963820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f87751d403a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373241/normal_5f909afd7a69a.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/33a68d70cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481423/normal_5fb37e4aa4c18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_5fa65de639193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5fae52012a647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497356/normal_5fb2a82dd9566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389101/normal_5fa6858a8d4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f9f6b9bbebda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f92a89a6cfee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389824/normal_5f8ff48c8b3ed.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/724d965e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f888d0587d4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/50cb9efe-ef62-46e7-809e-b697a6d1d8ae/tokadunanekuzexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8237ffb-d752-477c-bc9b-5e28d623eb11/3_star_hotel_in_new_york_city.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00019a05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19A05 22284 bytes
SHA-256: 578e1c9c1409b0c0eb1d484b230090c1de7ad7878fe74dfc2170bd87ec6cd87a
font_00_sfnt_off00010d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D61 14808 bytes
SHA-256: 60e7ead838741366485846c68abfd1c0293363513e9c627e582291ff8f79128f
font_01_sfnt_off00013dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCA 5064 bytes
SHA-256: 9de5a7591528be846a31b8f919bb872263ea0c781293d4e551d88ee0558cc884
font_02_sfnt_off00014ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE2 8836 bytes
SHA-256: e43132fe7e37b41d69fec6ec50423946dcc02f07b12a83cf967b31c450a047da
font_03_sfnt_off0001674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1674A 16208 bytes
SHA-256: db0804ffd5136002a52bb47ae48d63856af96576403d5c1b44a21a1f9dac5081
font_05_sfnt_off0001c10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C10D 4272 bytes
SHA-256: 1c9a446bfd068ea60e8f8ae3860367f8ee7aaae4c4d31c6ae6a375206dce9c13

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