Malicious PDF — malware analysis report

Static analysis result for SHA-256 405a034548a54dd7…

MALICIOUS

PDF

99.8 KB Created: 2021-09-03 10:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5b645f0f3ba6ea3961ba341c0a15a5bf SHA-1: 4d780598c7e34f40bbb50c2270c719d0eb2ede0e SHA-256: 405a034548a54dd7a7d913685568bf14c5c8f85487f81dc2c9aa3f5d536df952
124 Risk Score

Malware Insights

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

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan. The heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its malicious intent. The primary goal appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2108

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://maggies-handmade.com/UserFiles/files/zejimonusivegimamevirog.pdf In PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a321b8ec015---pejuro.pdfIn PDF document text
    • http://hotechike.com/files/files/liviwivobiwew.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/78b6a84ee8dd0841c3dc3d62ba5f668f/getifarenodowo.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/gasusegekitiroreli.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210603233459.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ameglfgetc5b82rupa8gipta37/joberarulolonogirojunu.pdfIn PDF document text
    • https://incense888.com/uploads/files/202108202219116601.pdfIn PDF document text
    • https://terrebleue.org/userfiles/file/76428423383.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/varevufaliwalasaveto.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/xixiziw.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/vuwiselamuvupap.pdfIn PDF document text
    • https://cargotavio.ru/files/file/sajinexunebaruw.pdfIn PDF document text
    • https://callalilyvn.com/upload/files/vakiladef.pdfIn PDF document text
    • https://www.aeap.com.br/ckfinder/userfiles/files/fokenizidurebinuvisuron.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c5ab42f47---meziwonagaredesejukonorut.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/bfdn5gfgc0tt0e5o34qs6qo3a4/37906280698.pdfIn PDF document text
    • http://epmachine.ru/d/files/nekem.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/gubabuwat.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/15782503454.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/mol2jmvc46olp5pmndoegjgub4/pewutuxipezurejasij.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/264c45c25f361543951de7d8b7748752/nafelokoxojigede.pdfIn PDF document text
    • http://oumkua.com/userfiles/file/geluvimebitulebowofivu.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/gafazogozedisevadakopi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=woc+kolik+abdomen+pdfPDF 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_off0001338a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338A 22392 bytes
SHA-256: 22946d009cc4d53eafa3eff41fc9380fc6fd29f7fcc750550ef1817fb4c3a855
font_01_sfnt_off00016a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A52 10640 bytes
SHA-256: 3f4d5125cb68682426031f5337242b0ca31d6093bae54f8d52fb869c6f626f6f

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