Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6796307add58675…

MALICIOUS

PDF

76.3 KB Created: 2021-03-13 13:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2356a310ee9ccfddeac554e61d29276 SHA-1: 2d6fbf0deb7ac8406788cd233fc79510b1f0c9c3 SHA-256: e6796307add58675415908acf7485988845b4411eff1195a2cb3f9c2f2fcb02d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many of which appear to be part of a link farm designed to distribute SEO-optimized PDF files, suggesting a phishing or malware distribution scheme. The embedded URLs point to domains that are likely involved in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=yahoo+messenger+offline+installer+free
    • http://daludaja.getenjoyment.net/what_is_the_minimum_value_of_fxx2-10x19.pdf
    • https://cdn-cms.f-static.net/uploads/4494146/normal_5fd8158af3601.pdf
    • https://cdn-cms.f-static.net/uploads/4445340/normal_6031d36cbc0d5.pdf
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5fdfa5214a5f7.pdf
    • https://static.s123-cdn-static.com/uploads/4377400/normal_5fcd5db0e9e0c.pdf
    • https://limavewudadeku.weebly.com/uploads/1/3/5/3/135323498/xujiwovukuvona_xikor_sifojeku.pdf
    • https://static.s123-cdn-static.com/uploads/4369324/normal_6007af5cea04d.pdf
    • https://cdn-cms.f-static.net/uploads/4450440/normal_602297a0221ce.pdf
    • http://gosoxegekiri.mywebcommunity.org/3._what_is_the_central_theme_of_the_poem_the_road_not_taken.pdf
    • https://cdn-cms.f-static.net/uploads/4460450/normal_602d4d3cf1105.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_602c4af4375ba.pdf
    • https://cdn-cms.f-static.net/uploads/4490367/normal_603d435af0439.pdf
    • http://zenaxudoriw.mypressonline.com/the_hound_of_the_baskervilles_1939_ok.ru.pdf
    • https://zegekeli.weebly.com/uploads/1/3/4/6/134616407/1425831461dd9.pdf
    • http://pobesegu.scienceontheweb.net/57218828073.pdf
    • http://dimozakebaba.scienceontheweb.net/10179651350.pdf
    • https://cdn-cms.f-static.net/uploads/4424951/normal_5fe8806bb2555.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wolobugoxew.myartsonline.com/how_to_find_the_common_ratio_of_a_geometric_sequence_fractions.pdf
    • http://gutekuretejapoj.onlinewebshop.net/areopagitica_john_milton_espaol.pdf
    • http://xepuzakudera.atwebpages.com/ronedulofimotapalete.pdf
    • http://faxiruvud.myartsonline.com/66684037184.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed38.bin
82324eaddcdc938cdc54edb2f9a945a5ac0e5672e3f690fc36d37e240af0908e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED38 5144 bytes
font_01_sfnt_off0000fe8e.bin
dfd049aba839158c0e89540538fedba103ba58cfe3d7c6f21f9a3bc9a6c71fe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 11000 bytes

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