Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e16b615bbb22d4…

MALICIOUS

PDF

91.8 KB Created: 2021-07-01 09:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13b7344eb8af4ea06aa5da41d355015e SHA-1: 7c59b4e34feae3691e9562c06fa02b2f99452572 SHA-256: 00e16b615bbb22d4e6d1469674b72288a99405b900c361d496be78c7a0908036
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the nature of the links and the PDF structure imply an attempt to exploit users via these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/130334581360dce6bc9633e.pdf
    • http://wecans.net/_UploadFile/Images/file/76036204207.pdf
    • http://sotel-perm.ru/site/file/tarenakev.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/211d781ceee50520af60a319adf04c2b/89908035369.pdf
    • https://arzhosting.com/calisma2/files/uploads/1832182938.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/679ceeee53bd0a4b7e0fb7a9511437d5/36578382855.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d70f3353a01---36612189286.pdf
    • https://celebicatering.com/upload/ckfinder/files/vavudapupojurum.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/aklqlos7vkn7j0ccjpmkgs02c7/87336801008.pdf
    • http://botosani.ro/img/uploads/file/zegupomobitozob.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05ef2c460b---boladerajekeloboxa.pdf
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d92abcd8af2---24091430876.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db203e36dc---balujokuwa.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/17c95e6d0f27672f0523ee0e131eff94/gevofepabalafujidapokajep.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4dc587af7---rujetiwizinulowebe.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/a15664962384fc745339c31a30f89df6/texijobepikujixo.pdf
    • https://divinenine.net/userfiles/file/96098414609.pdf
    • https://hirurgija.me//files/borora.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b1ba7e25---63980539098.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1606f074f4b714---97162865140.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65105187c7---35663385966.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b364c4b79---59090938260.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa78e276e55---22046127545.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/n794224crdfq2qj70nd9m9mbi4/33713029463.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/bejijnqr3oet5sdtvph6ahjg11/pumefumutej.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160921fd52ba68---bafireden.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a514a3cd8ac---sinuzinavudoxidinen.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b33061341a---32182324010.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=welcome+speech+for+party
    • 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_off00010543.bin
9f3c4d3d7df54167e0253ee13b582cfb72b47228922a28fdbdad139b11a59933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 17080 bytes
font_01_sfnt_off00013134.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13134 16792 bytes
font_02_sfnt_off0001494b.bin
7e3b22aa6b4e840bfd95cda7aaaf4817cc462e42d2fbbd60848a162fb318e908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1494B 10656 bytes

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