Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eb70e05b637246…

MALICIOUS

PDF

86.2 KB Created: 2021-07-21 12:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e91f52d9194b4bd93bcf16bee3eb0347 SHA-1: 20f752032b0478616512bf90236aa5d54a54a4ce SHA-256: 34eb70e05b637246fa3de493a3ca624f16db8995252c7577b5a2d99d9ff963ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of numerous links pointing to compromised WordPress upload directories. These links likely serve as a mechanism to distribute malicious payloads or redirect users to phishing pages. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4f1cceb7c---rajudunevawujube.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070a61c81df3---13419771205.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160d65c82431af---pikawetefokanaba.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081201316f50---ponevodalawoxogas.pdf
    • http://akkoryazilim.com/userfiles/file/furetasig.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/b2858b7173de447a9ae44e183f38e009/63780781700.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160742b850d112---xuziletijanotedizixejifo.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bb4e413c---70569288189.pdf
    • http://www.anjhimayath.com/upload/file/fababujilesikebimofiwido.pdf
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fapupimaropulefomupuwuf.pdf
    • https://tempatpasang.com/contents//files/39072874222.pdf
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5c0abed7673e9ca28efd56b5ea573daf/natarakifalisemipujinimu.pdf
    • https://aimara-bg.com/userfiles/file/xudero.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bb49b791abf---97214895558.pdf
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/sajitifokuvuvolule.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f8b29361c438cfbfdf3162f2e2b49100/ropopino.pdf
    • http://kaies.cn/upfiles/210629004006964247whufxh.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade13d1f587---32267777856.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/21aeee2960204b4bccdae1304de6d71e/sutuzofululigevumidiwubu.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091f343d6f69---38573439072.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609109ad3c69d---pufebawopabotewa.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095efc1163f4---92333485092.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=area+of+science
    • 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_off0000ef30.bin
a50ea3fd54ae772652c64a9b57b7dea133e9ac8fa5176b1468629b0e22c6397c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF30 16932 bytes
font_01_sfnt_off00011b60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 16792 bytes
font_02_sfnt_off00013377.bin
f81ec0cdca0b4a01d52b6dda5fdd4b4ad6d710067843c555e3f979b76a4f1364
pdf-font-stream PDF embedded font (sfnt) at offset 0x13377 10168 bytes