Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ac510c359bd631…

MALICIOUS

PDF

78.1 KB Created: 2021-07-29 20:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f34803d7921b4ef9e1967b95daec24a SHA-1: a023d84d743edf369278be41e0d2ae427db69fb5 SHA-256: 94ac510c359bd6318caaadd974e31da96a5629cc695df970fa5ac1e65cab365a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate that this PDF is designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3586

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=catcher+in+the+rye+pdf+vk PDF link annotation
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b48ce6fc55---5533017592.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/diviwutegixijeki.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b86bc0924b9---sipawiwejurelarowovisu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ade7797dbcc---86168416354.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/96648063215.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/54c067c3b7c7cac56450951d8a553b9c/duzegejobera.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a27120a1b3fa6a7ca2c9d84756ad3833/51752213000.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3f1ee661---31926042108.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/d954a8284eb3e8dac6542b2e3b74a805/junadibefelelurite.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/mefokixugajeverutexafaso.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160869c59acfa3---99158587102.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/d93f0553273667ae36fc96537ee588a6/wibesogiserilabomeke.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/5f8cd73ea9c5b5d345cdccef3cafff11/zesawip.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/isifoligunixegom.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/fizemo.pdfIn PDF document text
    • http://briarcliff68.com/clients/71184/File/55521502781.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de205a7eab2---54762870300.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/wewiwofonajanadegaxibifo.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/72743667356.pdfIn PDF document text
    • https://starbox.fr/img/files/49438664393.pdfIn PDF document text
    • https://warungmimpishio2.com/contents//files/furofewugava.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/povexipezukugibepefat.pdfIn PDF document text
    • https://pnp-studio.com/fckeditorfiles/file/23655853575.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/buxavotutitaximel.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/924a4efabf9be6fcf652b2fe3022ef77/32892103894.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/94892508690.pdfIn PDF document text
    • 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_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAE 10684 bytes
SHA-256: 504e52f3deed999e7d646648e162ae18668fc3b0e0f00abd98aa2e10e21a748c