Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f4b9ca3a5c2c17…

MALICIOUS

PDF

64.0 KB Created: 2021-06-14 08:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 32c32e05e6d0a20bce97949bf7af4834 SHA-1: 2d85b3f4cc2634d9018dd32e8d86f8eee82d6529 SHA-256: a6f4b9ca3a5c2c1792684d2050787b8b3b57f44d1ac1faa26f84c78f04b17dab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead the user to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9522

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://ketchas.ru/uplcv?utm_term=thamara+poovukkum+mp3 PDF link annotation
    • http://jnnycc.org/userfiles/file/sidudi.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ffbdba9958cda4a02d4fdae7a0167beb/45912917956.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160acc0734b947---fakorevime.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6ea470426---wimosepujuresuda.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/56972664868.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/10277267702.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48ae65328a---51885124570.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3aa1874b1e039ed7cee761bc0869c09c/6044944693.pdfIn PDF document text
    • http://vce34.ru/attachments/file/14013368258.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ed867cc20---69010071103.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/jubisuterobomiporavuji.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/zakuzawojufesamatasulef.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705b06928aa---kevibuxemepekiniwirutezal.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0be672bc7b---dikuta.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/85ef8cc76eebbc99fdde51dd79c4b817/dalukezuvasakamabuzumuke.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/ralezebi.pdfIn PDF document text
    • https://etadelloro.it/images/file/23234381612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55A 5088 bytes
SHA-256: e8ba9eb5678357cb5f4d00ab2749980f79349e68ec8b727709781042363a91ea
font_01_sfnt_off0000e680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 3664 bytes
SHA-256: 224c8a25eca7c0a6fdf873e21f46318a7c1394499b0f4d4bc7b275cefb58c9fb

Open this report in the interactive analyzer, or submit your own file for analysis.