Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd9da6ac7f26863…

MALICIOUS

PDF

79.7 KB Created: 2021-08-24 22:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 76793db1f2e402d842c4377147571662 SHA-1: 13ce88afb8fe7833c68eda7582a6cae36f2af7c6 SHA-256: 1bd9da6ac7f26863d73edb739d493bc5008d6a3923d779b3990df7a010c500f4
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malware distribution lure. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5756

Heuristics 5

  • 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
  • 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://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/da9f1c1002fa83f96bb55286ff592551/nulorediv.pdf In PDF document text
    • https://isleo.com/i_photos/file/dapefovewadukava.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/sabunobijupowolitezizer.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b1a6584a7---63908963533.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/65734542311.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/93708313818.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/wosogerezegapuduwutusewu.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/jegonerinojazoboti.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/72108712150.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/923ab13c9cf22d1a6e789f96c2927de6/46458201511.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/zawosikanawukupodewemasi.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160752abd8eef4---fibikin.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b29df58251---texeketowikobinaw.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c358aabc3dc---bugobedejijajimaxegise.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210522/file/kumezozaralinufe.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/78368688946.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/gubafidise.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/91218327175.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/af597e16650a2cb220ce5fc58d920106/99254816971.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/760d09dtpcri0gcd678518td5b/lijot.pdfIn PDF document text
    • https://blv.by/upload/editor/files/zewefexogulave.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/doguvife.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/dusoxeromovopip.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/232063c19555b41711fe1f89ba063f29/79662987296.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c0bf3d229---begax.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/loseb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=where+should+i+go+to+eat+todayPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 10632 bytes
SHA-256: 2846082d1b6995c565744883ee414fd532748fa25625aafa5c624768ad5d183a

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