Malicious PDF — malware analysis report

Static analysis result for SHA-256 3595f778c9ceca5d…

MALICIOUS

PDF

99.9 KB Created: 2021-08-20 21:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bf09eea06af9361ee3d76a0ea68f52b0 SHA-1: 8d2a48a10b12a5e0616ef82bd2809dcdca904a9a SHA-256: 3595f778c9ceca5dee5f1a9fb1192bf113027599a7c5441c6dce2c478db75f93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure suggest it's intended to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • 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://oniceh.ru/uplcv?utm_term=positive+and+negative+effects+of+volcanic+eruption+brainly PDF link annotation
    • http://biirbeh.mn/images/content/file/batorowejodim.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d73f85fef88a8ee49954556a169aea3d/69520501016.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc8db528ca---9629990287.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/zemuwefopened.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d1906d11ee1---xojepibesejigogemux.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/42863868328.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/47335239797.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/32546237867.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074af80132f7---39649981681.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/e8064b38ad0a77caaeaa32302a13a3c0/27552501650.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/rarisuwuvufifoto.pdfIn PDF document text
    • https://ekransamara.ru/files/22396866605.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/tapis.pdfIn PDF document text
    • https://coffeetuanvang.com/Images_upload/files/kajogixojojugagajewo.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160712d6a3cc87---94210437438.pdfIn PDF document text
    • https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/tumegugivilaweduzi.pdfIn PDF document text
    • https://activepymes.com/pub/file/gasaxewedalekoxeri.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/5eab067dd47f69d5b6673e824fec5f64/situkamenodovu.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/511bf77f4a9da8b6f90682a3696d8845/depufowuxixitugova.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/4fvre9itpbi24jvpnbmcmkflad/sinemovejiwejumimigexow.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/b6a1e8659abc1499ccee4ba1d74e3b64/xugasulefizudokabofike.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/r29vvnbre71a77ikmi9ucp3gbv/82834035346.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/22082589229.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/wovofum.pdfIn PDF document text
    • http://mientrungpetrohotel.com/users/files/76914980989.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 11216 bytes
SHA-256: 2a8f782ebf292638e8710c2df49eb906a51a509827005ffd65609fd93c00b4b4
font_01_sfnt_off00013c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001548c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548C 17172 bytes
SHA-256: d434835ed1960ddb7623f9e57d9b170baa05f9f5ef192891e11e963251bd0be1

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