Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de6d9d8720786db…

MALICIOUS

PDF

81.6 KB Created: 2021-03-04 17:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79b78fabd22fa1355a8ac091e4cbd6d2 SHA-1: eb3a6293f2358e5493d85f4de633b2ca283bc3ca SHA-256: 3de6d9d8720786db30291d1717dc292a1e1db095805fd66a1be9036af6947067
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. While no scripts were directly extracted, the PDF structure and numerous URLs indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • 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://ponafet.ru/wix?keyword=nature%2527s+answer+liquid+norwegian+cod+liver+oil+review
    • https://cdn.sqhk.co/navimoxa/bncjbib/super_american_trucks_mod_apk.pdf
    • http://tapozifokun.mywebcommunity.org/32699448894.pdf
    • http://jujovobima.getenjoyment.net/dark_sun_gwyndolin_cosplay.pdf
    • http://ligumexijigab.getenjoyment.net/essay_for_grade_6_students.pdf
    • https://cdn.sqhk.co/xebosulog/ifibgcx/3d_checkers_game_free_download.pdf
    • https://cdn.sqhk.co/varipivokil/w6iarDz/advanced_pixel_gun_apocalypse_3_y8.pdf
    • http://xuwuvewisin.mypressonline.com/tibivasoriwaxafa.pdf
    • https://cdn.sqhk.co/rixazezozo/hvigzMP/hero_xtreme_200s_review_team_bhp.pdf
    • http://kedugobepuged.mywebcommunity.org/sekukobiner.pdf
    • http://paselon.getenjoyment.net/against_the_grain_james_c_scott_audiobook.pdf
    • http://nowukusox.mypressonline.com/8282489918.pdf
    • http://kepuxom.mypressonline.com/savixuvov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_04e5ae86a3f2497793a6bef865f95f62.pdf?index=true
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_46eca15755ac4952a7974029559d3e4a.pdf?index=true
    • http://bogalibamadom.myartsonline.com/caracteristicas_de_los_sistemas_de_manufactura_tradicionales.pdf
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_b8da6a53bba945b3a9c36e7d2ed938de.pdf?index=true
    • http://xabudavadeguvo.myartsonline.com/optomcas_personal_statement_example.pdf
    • https://f33d1b56-f518-462b-b61f-c1b5c1ba661c.filesusr.com/ugd/1c44ce_04784985329f41fa99bb7c64dcb5b9c0.pdf?index=true
    • http://kewetanetoza.atwebpages.com/doloro.pdf
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_6f6699783e5b4b00808b1e631f91ec60.pdf?index=true
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_75a9a68646e34f9881de45ac474c1e03.pdf?index=true
    • http://vilepobafomunow.atwebpages.com/pulikija.pdf
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_44fc1981ad7d4bb7b7bda7fad4da4c1b.pdf?index=true
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_5f06fecc30f54e2688993834b0257246.pdf?index=true
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_77ca5720a2404fc18bbc03161a4216ac.pdf?index=true
    • 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_off00010154.bin
749e5fa96da086a98333c1d5798e148a021cda7901b99530e1ee5babbfe7218e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 5388 bytes
font_01_sfnt_off000113d0.bin
ec9b398669d65563cb26fdf4f836cd24851721a0d63c20252dcc4b3d3239bba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113D0 10688 bytes

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