Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be1499b1360683a…

MALICIOUS

PDF

41.9 KB Created: 2020-10-17 17:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33b6a103d83b189eba7bcb348e5d0a06 SHA-1: 3d5582ba114bccf5fb04bb348d1c44c08035b525 SHA-256: 4be1499b1360683ab4c0077ff911c793c54efc39e029325619bc2091e3083053
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse. One prominent link directs to a known malicious redirector, indicating an attempt to lead the user to harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/strik?keyword=dante+purgatorio+quotes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f8a6cabc9110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5f8972f50a10c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8a8687d1f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f86f651ce858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_5f89d01433a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8afe2284d9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f88fad1352ea.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/ea24a6.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/dogigitoninewutobeka.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/f7f429ddf6.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/96cac65e4da8.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/luvegarogizusuxukab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8714a6dde41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_5f895331a7afa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f89743b54a43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365662/normal_5f8a41785ff60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f87bc441bd95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8749cd0ad9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8a7174cb744.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/tp_link_tether_apk_pure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/49851108137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/2603/5100/files/43407327842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6286/0207/files/seis_sigma_ejemplos_practicos.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5516 4960 bytes
SHA-256: 0c2d8911579d97650b701a798ec07f85e966529097b35e61a3c74fe7763c1151
font_01_sfnt_off000065fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 11184 bytes
SHA-256: e256711fb3eb79d8b1556f43671a195c20b1e04102b3f520a0cd8aff53f1abb7
font_02_sfnt_off00008a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A71 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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