Malicious PDF — malware analysis report

Static analysis result for SHA-256 709356ab448036cf…

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 19:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 59678ab4f1fffbd3dfda468723f9f265 SHA-1: 4fffc2933e75ea52189e0176041884bb2910b092 SHA-256: 709356ab448036cf27fa871c36a175c42f60075407d4001871a8b3a726670a55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that act as a link farm, directing users to various websites, some of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://smidgel.ru/uplcv?utm_term=gta+liberty+city+obb+file+download PDF link annotation
    • http://tiendanatacion.com/noticias/files/77073953882.pdfIn PDF document text
    • http://elsped.hu/files/file/tinurulipowij.pdfIn PDF document text
    • http://axwelindia.com/uploads/39790354273.pdfIn PDF document text
    • https://digireg.ru/upload/zujelumovesoteper.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210902_011629.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/92921891955.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136dc5b1caff---favigipasogu.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e63b100ea---53513630059.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/c114fbe8a541onjbtjdbp6i4vq/jegisene.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/gewatiwubufipexa.pdfIn PDF document text
    • http://satunatc.ac.th/ckfinder/userfiles/files/dawefofibivusarufodaja.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/vozaseta.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16137347f53988---31239864328.pdfIn PDF document text
    • https://gesema.com/UserFiles/file/44416762357.pdfIn PDF document text
    • http://kovovyroba-nosniky.cz/UserFiles/File/79531554990.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/3449580709.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/lusapelid.pdfIn PDF document text
    • http://xn--lv0az70cxar.tw/uploads/files/202109010757259221.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/bikutowinurofobigu.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/92799833374.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/55695084575.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/9365461518.pdfIn PDF document text
    • https://loonbedrijfschimmel.nl/userfiles/files/44776683198.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/sivelusuvobu.pdfIn PDF document text
    • https://e-ceramika.pl/userfiles/file/gapilazawowum.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 10680 bytes
SHA-256: 22e0a404cb6d1eca55db80028e2d62bf1c4189924caa174d1e8a300987864f7b
font_01_sfnt_off0000e5d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D6 17544 bytes
SHA-256: 0988cd6457ee6ac3cd4c9753e7573de6b6c290687e402f913a343d48a2cd6b22
font_02_sfnt_off000112b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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