Malicious PDF — malware analysis report

Static analysis result for SHA-256 d246938a6df78d64…

MALICIOUS

PDF

90.7 KB Created: 2021-06-28 05:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7dc7df125259a7aa15136d39215b119 SHA-1: 9de9412504863585da697fdaaaec3ed2390dd03e SHA-256: d246938a6df78d64189852f1f8f237ca46e0663aaedb5e7d86ffd63a633b4b4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16071aea490454---89063124050.pdf
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/68482736586.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609601c1a497a---luguvimiwuxoxopobenala.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5f6ebc0b5---resazatimivegesenexi.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/12b4194483f4ebb5d725d0d0e478d3b6/39048495902.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/80306784505.pdf
    • http://derma-dts.de/files/file/binezezarelepovek.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/a2740c1f2da1972716a3d2038f947df7/60632124112.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c50e024bd---fopobesem.pdf
    • http://asckhn.com/acskhn/userfiles/file/bejawigo.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a92bc8793---dalemalorosavuxog.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ufisj0fvikdojfa3l4hfg665nl/7994751529.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/3668ca2e02ab8087fdad3c20f3fc4984/5109483956.pdf
    • http://kartywspomnien.pl/uploads/assets/file/tajotobitozakine.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a8e3c776b20737ef0150999c0caf0b47/miligo.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ced088ca71f---45305012491.pdf
    • http://forglass.sk/userfiles/file/12239207687.pdf
    • https://hse.tw/upload/file/labibegiwujigoperuxim.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099158664bb1---xekelumukamafe.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160c22294e583c---rivibe.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097d5d8ef0fa---12915382437.pdf
    • https://pmms-online.com/assets/file/januveredoxamofavikelejom.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/6bfe74f298b4a2dae8482ecb4edfb86a/petumorufi.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e239a9f67---jivuruzilazudijira.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160949523e20c1---nigimugafimalunerafomijo.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa244e56b13---luguzitelev.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=short+paragraph+examples+pdf
    • 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_off0000fefe.bin
e6de1e2030af3704d0b99af656ba519c5a6c6f5f2aed84d42456dc0d4ab24585		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 10924 bytes
font_01_sfnt_off00011829.bin
ec92f5826d253ca2116829bd04d72a476a86c8fb73bacc944723661716bedc49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11829 17200 bytes
font_02_sfnt_off0001456b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1456B 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.