Malicious PDF — malware analysis report

Static analysis result for SHA-256 071e6dd27c9e0a93…

MALICIOUS

PDF

103.1 KB Created: 2021-03-28 19:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b018c1b0c468aad3223d6dc0392a2a30 SHA-1: 414cf7bffd5b826d1ecf5fe1c397dc745c81627e SHA-256: 071e6dd27c9e0a93fbaaf618c94f16f57f1b3f8b0703157e5cca68df4ce8d69a
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' containing 30 external PDF links. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution. The embedded URLs suggest a tactic to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/award?keyword=competitive+analysis+example+pdf
    • http://vololagabedopi.22web.org/rewesuruxezomekitikizika.pdf
    • https://cdn.sqhk.co/salosegebomi/ienhehc/zozavopavatikozevixu.pdf
    • http://benevesegok.iblogger.org/kevutofolifaketub.pdf
    • https://cdn.sqhk.co/wosepimi/igfIRON/40916789000.pdf
    • http://wigomufeze.22web.org/dudibixubibor.pdf
    • https://cdn.sqhk.co/veleviziwew/zqahiaW/dulasifenizimijelujaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_9d4bc78efabe495682e0afb7cd4d6a8c.pdf?index=true
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_15842a990cb94b4c8dbb0e237bfd5cdd.pdf?index=true
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_c1d24e1318ae4af492e46045503f346c.pdf?index=true
    • http://tinafominur.epizy.com/four_color_whirza_guide.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_e940d963590b4e82a3263cc87a37393a.pdf?index=true
    • https://s3.amazonaws.com/tobojelusiwi/android_turn_off_auto_start_apps.pdf
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_56d6477f199648dd974ce7c117f409d7.pdf?index=true
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_764ff9b24d1d4722819163ad6a8f609b.pdf?index=true
    • http://bibobega.epizy.com/36604340877.pdf
    • https://s3.amazonaws.com/nedijowewoded/kundalini_breathing_exercise.pdf
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_1ebd4d6d7b6040f88642778a3b3c6d78.pdf?index=true
    • http://jasetaroxakil.rf.gd/devolo_dlan_500_wifi_user_guide.pdf
    • https://s3.amazonaws.com/pajeriramal/gesumotixewejoxobegezepuj.pdf
    • http://bikikifuxax.epizy.com/film_castaway_on_the_moon.pdf
    • https://s3.amazonaws.com/dowesitobuga/4427823540.pdf
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_710e907c280d4dc8b9b221d995ada5c8.pdf?index=true
    • https://a7176590-a44a-43b4-8b25-1171fb6190ac.filesusr.com/ugd/e6ccb8_9c84c4b05ca4452aabaff4a4e3cc922e.pdf?index=true
    • http://lazefip.epizy.com/ranavimubexazojalijolasor.pdf
    • http://lujuxug.epizy.com/5692079126.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001325a.bin
ad3a0d8c26e41174adb07f06f83e9cfc9697cc81491acdf3343af8e3bbeaab71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1325A 5132 bytes
font_01_sfnt_off000143c3.bin
1876de048633cc0477226610c58191db55970f4db8c209a2d6dc2f13c0b46bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143C3 10928 bytes
font_02_sfnt_off00016916.bin
b14e51e28b7353056a2c157a38aed59d0b2d8edf26ca7653faef6002bbd3b691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16916 16188 bytes
font_03_sfnt_off00017e44.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E44 4324 bytes

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