Malicious PDF — malware analysis report

Static analysis result for SHA-256 959724f525ed68ad…

MALICIOUS

PDF

94.0 KB Created: 2021-06-29 20:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfdd71bc6fbbe5f65fd79997aa16e8a7 SHA-1: 403cfe6fac1e8831d9e92e4d882637bfbfaed12f SHA-256: 959724f525ed68ad6444e61f8371b50b5f388a96a48eb7c2fe3bee2e2eabd0a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of a 'download' button lure further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=aimbot+for+phantom+forces+roblox
    • https://hotel-la-licorne.fr/userfiles/file/65812903223.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/8a66ec080a54532665da98f1fdd48a9a/mokixu.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160834ea7a93b1---nibomiz.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/94799736233.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cded38ac991---dijuses.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080a4a161185---pimavisexili.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e38399361---zazumeludejovabu.pdf
    • http://stacjaregeneracja.pl/userfiles/file/wojina.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/1d14a0e6500c96f389d4d8d06b084620/tasebo.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebd235f161---97828034109.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0362c89394d3058676115b815dc65e75/55021917169.pdf
    • https://licorne-hotel-restaurant.com/userfiles/file/sufemexavufebitoj.pdf
    • http://syarmarka.ru/userfiles/files/kojepufed.pdf
    • http://pcccphucvinh.com/upload/files/kusuwipa.pdf
    • http://bright-mineral.com/uploadfile/file/2021061119234490.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/cdd3da2af6e5c5573d01059af3ff96ac/48444554660.pdf
    • http://deborahkay.com/ckfinder/userfiles/files/zenigawozi.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/7639730204ee94bcae630371b2fc4629/62335740648.pdf
    • http://s-moonlight.com/CKEdit/upload/files/javenewemufozovaxevu.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/4a34b8b04286059c7a1fe69dd353af4c/lajizakodusukor.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a844b5638f---tepudepakemazako.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9527a08219---valoxofu.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/2a215bdf877172b7cd89070cdf9bdca7/zonumukajuzezan.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://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_off000104fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x104FA 16792 bytes
font_01_sfnt_off00011d11.bin
7b3d92d5b31218b58bb9fa55d0fb441d3dfdb006879c2acb0a4a582a633030a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D11 10968 bytes
font_02_sfnt_off00013620.bin
9c244cc8c3a062dedeb73581b192eab9ebd9be16befee05e3cd2aced72e47f93
pdf-font-stream PDF embedded font (sfnt) at offset 0x13620 19816 bytes