Malicious PDF — malware analysis report

Static analysis result for SHA-256 095e1b3a2c7dedb4…

MALICIOUS

PDF

93.3 KB Created: 2021-06-30 17:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e13ad5ef31abbb4ddee96f9f7e712b21 SHA-1: f6a45e16dddd4dc5c7a413a0c696852628172386 SHA-256: 095e1b3a2c7dedb46acf9c887d6ad9949d68f7381488a3481f9e1c67f58cd3b8
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites, some of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The document body is unreadable, but the heuristics and URLs point to a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 6

  • 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.
  • 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://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fb4f408af---38759725012.pdf
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/34707734627.pdf
    • http://e-skala.pl/userfiles/file/79674023986.pdf
    • https://alihuata.com/userfiles/file/xulejaresokulud.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a0c9a6bec30277fbb94d155fe336fdd3/61597304301.pdf
    • http://qytbearing.com/upfile/file/32472309922.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cfced9cb1c6---bixab.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d4f0b6d5f---45714049978.pdf
    • http://oreade-breche.fr/userfiles/file/99648732360.pdf
    • https://topupdana.com/contents//files/97002052814.pdf
    • http://salon-urody-bellis.pl/images/file/sofaluporutekomosiwaj.pdf
    • http://pulsarvn.com/media/ftp/file/febosebipageluzujasafa.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/b80pupjdqk3dmitk0qv59tukok/85255419381.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b7568e6b2---jimaju.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609906147876f---tajesenegulamulibipezez.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/622bd1231e69fe06de61671583deef68/89871117158.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2700e019c---rowegud.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f269d9e9---84203527058.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/a85f086851240b43e13c06b6deaf2fa7/61530255604.pdf
    • http://yjccnc.com/upload/files/tonozabideridixewolivaz.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16073bc1620db4---sadorivedun.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/8239c3015eb76a1695c5e78190bacfb3/33250333069.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/5b92a6c4b70995e61d6f74f4f44361b9/87175144355.pdf
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/f7a666eeca24fdeb9895cfdb4b75b979/gumor.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=excuse+my+manners
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef48.bin
115b418de671664b2b2389805d710068f6007e4508dd5a97e03637cda0987e5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 16504 bytes
font_01_sfnt_off00010638.bin
16531ef3275bff0afbe4c3fbeecaf722447980a9337a7f928dea57d07efd97b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 19672 bytes
font_02_sfnt_off0001383d.bin
c0caf9256654627c3aa650de83da50b56de8d7031e4d7e12e0e36b9bbcafd5ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x1383D 10332 bytes
font_03_sfnt_off00014f8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F8D 16792 bytes