Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9e3fbc3b9feb23…

MALICIOUS

PDF

57.6 KB Created: 2020-11-04 05:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 60b955dff898b4a2bb8dbed88a7634a1 SHA-1: 9de267174f5e3f26fbc6992852bb09a3e329ed9f SHA-256: 0e9e3fbc3b9feb23e36262e36052bdfd59a7ef21304fa412cafe75a368ce86aa
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://ttraff.ru/123?keyword=numerology+for+2%252F2%252F2020 In PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/rarolo-xurijidoz.pdfIn PDF document text
    • https://wimejevufafej.weebly.com/uploads/1/3/4/3/134379448/sudafedemawigogu.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/c22ea484.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/1418157.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/43ec7e21c5.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/kavitokolezub/45439309761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4487/9527/files/erasmus_mundus_program_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/vinegar_anniversary_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/lauer_custom_weaponry_gun_shop.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/important_current_affairs_march_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/duck_life_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/interesting_facts_about_st_cecilia.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/uc_davis_my_chart_sacramento.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10dacb22-fdc3-407c-b98c-c09c48bd81a1/45014066395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9e05dc-39dc-437c-89e4-f023f59c135a/pavexonifidanaj.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b4ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB4ED 21836 bytes
SHA-256: 854818c8423331558f93e8c4623a811773256cd9876d02629825954d0e07bf5a
font_00_sfnt_off00007ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF6 5080 bytes
SHA-256: afe0eb57906156c7bcd21440e6b00217e8d25fb0debee4df612ed04aeaf4bf7b
font_01_sfnt_off0000914c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 10396 bytes
SHA-256: 9cbd85f3bd8f0181c2cabc65aae4768e2dfeafa07e7479330e201f578ecb86ec

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