Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9e36b7157b753d…

MALICIOUS

PDF

93.7 KB Created: 2021-03-10 05:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7356bc56d4fab72413fe22235ea48432 SHA-1: eb2b339672415cf408b19dcc32a8617b45d1e6b7 SHA-256: ae9e36b7157b753d7769d69c56a7e8cd310ee78df7a201d59a4b35c37a30a66e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are likely part of a link farm or SEO manipulation scheme, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://ponafet.ru/award?keyword=budaya+jawa+tengah+pdf', is suspicious and likely leads to malicious content. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/award?keyword=budaya+jawa+tengah+pdf
    • https://cdn.sqhk.co/bogovureg/rif6cmx/golf_galaxy_warwick_mall_opening_date.pdf
    • https://cdn-cms.f-static.net/uploads/4459621/normal_6028a1cc3c53f.pdf
    • https://cdn.sqhk.co/ruzudulo/17hdLgg/arcade_belts_amazon.pdf
    • https://ligepakege.weebly.com/uploads/1/3/1/8/131871609/fe91b.pdf
    • https://cdn.sqhk.co/wemopizajazo/heRfjbP/6316506063.pdf
    • https://jawogebewo.weebly.com/uploads/1/3/4/3/134369376/desiwiwitixumowuni.pdf
    • https://cdn.sqhk.co/muresogus/Hgcgdge/88291163417.pdf
    • https://cdn-cms.f-static.net/uploads/4487187/normal_6023dec7f060a.pdf
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/nidanimasobo.pdf
    • https://nenubijul.weebly.com/uploads/1/3/5/3/135393623/lojifupuzoriwor.pdf
    • https://cdn.sqhk.co/tomakaxizo/ahfjahp/wejexa.pdf
    • http://lollipopa.online/what_is_the_best_project_management_approachdf16y.pdf
    • https://cdn.sqhk.co/kikolibub/iduidgc/34228814.pdf
    • http://o-karte-kopilka.com/34541113956jpjgj.pdf
    • https://cdn-cms.f-static.net/uploads/4427811/normal_5fdc88f082e2a.pdf
    • https://cdn.sqhk.co/jalosemuv/geihQgj/90077374999.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d5e64d25-aad8-4b6e-93fb-70a504347ea8/can_you_whitewash_pine_flooring.pdf
    • https://uploads.strikinglycdn.com/files/598d18d6-cdc5-4439-a30d-424d1bae13f8/blue_jackets_tickets_ticketmaster.pdf
    • https://uploads.strikinglycdn.com/files/9dae0d48-c4d6-4fab-83a7-b4fb4a6c76f3/what_is_the_ending_of_tokyo_ghoul_season_2.pdf
    • https://uploads.strikinglycdn.com/files/7172d6e9-b21d-489f-833a-7dba75bbc173/vilebalofoxatomin.pdf
    • https://uploads.strikinglycdn.com/files/9a59f6e0-3393-40fb-82e5-8c9f8ed34920/garmin_astro_320_dc40_update.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011295.bin
d73fa832c3c62ebd696a7254aac5e667f222e89b4c01a28a2a95ac4b0610beb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11295 5316 bytes
font_01_sfnt_off000124d5.bin
1ddc2399609e095ea9ddfbd0df34c91535c730350d8e42106211cf83339810f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124D5 15252 bytes
font_02_sfnt_off000153b9.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x153B9 16204 bytes

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