Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e718ea01b3961a2…

MALICIOUS

PDF

62.0 KB Created: 2021-08-17 04:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7e449b0d69bea1e7826dd85faf90a8a SHA-1: 14110788d00f5ece8a7ce7b8932cb4367d5e2b02 SHA-256: 4e718ea01b3961a287d8de6add02b4b2fb55daeb4d7e870709c73e81773eef26
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7599

Heuristics 5

  • 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
  • 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://gikguamerica.com/userfiles/file/15122330866.pdf In PDF document text
    • http://m3hotels.com/userfiles/file/farebi.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/16082312448c8e---93869694047.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16111b71bc46f4---xigemanapavakuto.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/giturilirimit.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0dfe9bf93c4055819ec771f7126dda06/90537344599.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/95051550467.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4adc79fbb---xotewag.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/14379405127.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/ucbja3fnp01erkd66b6360s5mb/38208537477.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/cd222496162f0bc2f342dc348d128e30/gobososagugiluvufu.pdfIn PDF document text
    • https://baongochoa.com/upload/file/sozebetowojajosiz.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/10972520551.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/70895955586.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/75077572205.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7cac3e84b---41576959491.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/1698df5304a33d590174d4d3602b3938/sibagazixazojeb.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79ceaf2d8---buborujimuvolokividu.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/51600025365.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/toleluzetabisosibazune.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/91188616209.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a948d62358---fofusema.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/f1ade7f3751de75164c16436b41a40a9/segev.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/lmc2u5bfkmig49v3rcclenm2qj/nidakene.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/53190536844.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sexual+vs+asexual+reproduction+worksheet+answers+keyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC971 11248 bytes
SHA-256: b27baa6ffc1da5198789df74802c63210a1c4638f9098c94e0a3fc42a450e423
font_01_sfnt_off0000e3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1