Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a054d5f03106e1a…

MALICIOUS

PDF

89.0 KB Created: 2021-07-14 02:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4a82ae7e625a13886f685cd040c2199c SHA-1: 2b6372cb1381514a020690a75d78e4f599d30833 SHA-256: 7a054d5f03106e1a0722794e60ca0afe8caf22ad53589a309be653900f57b817
124 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. The embedded URLs are likely used to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2520

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://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3945f75830---9888959949.pdf In PDF document text
    • http://cokhihoaiduc.com/uploads/files/vawaxo.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/87751222326.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/eeaaa7327ec655051600bc8b60991baf/1973967265.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/goziperom.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/3c4420eec7e2be2b8ad0f2c41462f0a1/37939166760.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e268482850b---xudarabunojukufese.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160adc016356ca---fujitafafoger.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/salimagenitowuwofabedosub.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/wolovipanonawugabax.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f862a77af5---13117918610.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/folimutajo.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/leroratazenidopag.pdfIn PDF document text
    • http://20thhelicoptersquadronreunion.com/clients/71358/File/giwevexolinuki.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/59335358781.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728a2a36d5a---8943654662.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/fdsjm41hoe57mqbs4ipnage1c6/wofisopove.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a33e49f393f---penazidomajuroxurivajuve.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcc3565c42---69705171188.pdfIn PDF document text
    • https://ms01bet.net/contents//files/65162439996.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ce8c0f27ba52ee6ea42168838a1f54c3/wedaxiforatogugiro.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/9a4195694509ff6d5f5c3449ea72edf6/97602805361.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/jajepewefobeko.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/2d25cd0790b5e952956d4690bbc0ed3c/soxugufuxuf.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/xoxavod.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/nutegusarav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hunger+meaning+in+teluguPDF 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_off000116ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AB 20444 bytes
SHA-256: 53888e868b82aef54fa715b05a1b86fb2266e071acb8cc271c3cdfbbba55dc07
font_01_sfnt_off00014a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1