Malicious PDF — malware analysis report

Static analysis result for SHA-256 217322b73d69da82…

MALICIOUS

PDF

76.2 KB Created: 2021-09-05 00:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4748dd393185864804e854efe98e0215 SHA-1: 9d860ea978167c3474ff66d6c14e1c4290eb0cf1 SHA-256: 217322b73d69da82088a8f655b37496c61af4917d867289cd1340da0ecaa3416
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The file's structure and embedded links indicate it's designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/1mcqnqd5jqeefme9n1hnnisret/83220558188.pdf In PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/569767a0c63bb8f33721e0671ac0ebea/jajubifanubijudovufek.pdfIn PDF document text
    • http://apsons.eu/files/file/garigugosuvokisuneb.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863bd2d8094---74786282618.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/venezokesuromom.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/6328280064.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/96879519682.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d0049f96e---mibakanikurevakezasaxapu.pdfIn PDF document text
    • https://csn-alliance.com/data/files/6193566429.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/21704660184.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/fowiranasepalifanib.pdfIn PDF document text
    • https://mfdesign.hu/files/file/99794218936.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed3716a4e---kakewoziwuvesuperijuf.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/fubixonosepisorukamuxi.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210610211337.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210614_084923.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/9vnvk5kf72a18nd0451elkvj0m/zexirometukokiga.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/fujadepu.pdfIn PDF document text
    • https://emprenderem.cl/files/70879971827.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/lazafulaz.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/54528738105.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/tavatulevik.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/a465301b856fb344265f3384f8193bca/nevujivuwowobatimi.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/fubuzaxikogefemade.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=csat+paper+2017+pdfPDF link annotation
    • 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_off0000c75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75A 16836 bytes
SHA-256: ae13540bac896869dd0a91dc4ae45068ec7504a48460b1a5c1d1911d61c507b5
font_01_sfnt_off0000f32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B41 10504 bytes
SHA-256: 3f981c08b06b09877866c56cbd02a1f9a63f2ce38e5f6ee33209dae4fc3f19b0

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