Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ca46eab74fcd46…

MALICIOUS

PDF

85.5 KB Created: 2021-04-09 22:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35b8bee019eaa71d5c9d0d1115756917 SHA-1: cea8ae13b766c9fa20b30b86716a7c6497eafedf SHA-256: 72ca46eab74fcd465c588320137a146b36baf16cfc39fd65978ce9a05f9830ed
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are numeric and appear to be part of a link farm designed to manipulate search engine results. The primary URL, 'https://xezojetit.ru/strik?utm_term=moultrie+m+series+game+camera+instructions', suggests a lure related to camera instructions, likely to deceive users into clicking malicious links. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

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://xezojetit.ru/strik?utm_term=moultrie+m+series+game+camera+instructions
    • https://xonedanafesiliw.weebly.com/uploads/1/3/4/6/134633415/bafow.pdf
    • https://cdn-cms.f-static.net/uploads/4481064/normal_602df766b02bd.pdf
    • https://sopuduzebuvagaf.weebly.com/uploads/1/3/0/7/130775825/xukuriji.pdf
    • https://cdn.sqhk.co/vugomupuzisa/7pAheVk/73573728715.pdf
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/8879773.pdf
    • https://cdn.sqhk.co/lojosewude/3jcQ91k/unity_3d_endless_runner_script.pdf
    • https://cdn-cms.f-static.net/uploads/4480893/normal_6055311da52bc.pdf
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5fe4b4634aea1.pdf
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/vimivebitonazizadeg.pdf
    • https://cdn.sqhk.co/pobojatizopa/3zjifhh/golina.pdf
    • https://cdn.sqhk.co/nezuxada/dq3hg6a/watch_spy_games_bravo_online_free.pdf
    • http://kofodotig.sportsontheweb.net/tonefagitojasur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xifabilejilab/96858391219.pdf
    • http://pidodexogejax.myartsonline.com/29911201053.pdf
    • https://s3.amazonaws.com/xarojapi/best_python_code_formatter.pdf
    • https://s3.amazonaws.com/bizamesuwepe/75440036342.pdf
    • https://s3.amazonaws.com/jivamubug/what_is_the_most_valuable_comic_book_worth.pdf
    • https://s3.amazonaws.com/somamere/html_form_action_attribute.pdf
    • https://s3.amazonaws.com/kezemiradigu/macbook_pro_software_update.pdf
    • https://s3.amazonaws.com/lawakux/what_documents_do_you_need_to_renew_your_georgia_drivers_license.pdf
    • https://s3.amazonaws.com/xupimaral/pre_and_post_testing_in_sport.pdf
    • https://s3.amazonaws.com/rojalexipokadaz/gitlab_ci_lint_report.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_off00011099.bin
aa5a52bc2d104725ddcd7445140c8f597dfe16ab6c5e268e1818493fdd06e949		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11099 5124 bytes
font_01_sfnt_off000121f8.bin
01766ee96c83ee4b23159e2ff5694b9d1df97d6cd36a269b243d29fa8e3ff49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121F8 11296 bytes

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