Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7973db244fe8b6…

MALICIOUS

PDF

347.8 KB Created: 2021-06-23 07:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 106cee4614d48b16a32f284dd9a55437 SHA-1: 5537817b8951fe57b88701e3b1325e6303388b79 SHA-256: 7d7973db244fe8b6cb244298269ceb211809cb545887085595db9b35a2081355
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress upload directories, suggesting it is part of a campaign to distribute malicious files. The document body, though heavily obfuscated, contains text related to urgency, which is a common lure in phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160bc541440c8d---bobunogam.pdf In PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/48fde0c6f26ce0de403be577d704fcf8/vinowupu.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a44b37f4e---32728907632.pdfIn PDF document text
    • http://texmet.pl/userimages/file/fonujo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/89e881b3bc72c8eb50053968851afb6d/nomebava.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e433f05f---xarepinomozif.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1811c2d78---demuwopuf.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c978439b45---61345150727.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/23251653816.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26b612a18c---55847299097.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/l5gb5cmbnh7lphae19m9l8msjg/pabiwokupewotigozife.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/xasetexapiposezemuluba.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/40342788472.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4a5294f9---fenudibokubujebix.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/d4fad1d6335d9cf7c0fa0f4985815bad/dojedipaluxakivusajiroje.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/39bb8031635938537e52bd14a4b069e5/466096875.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16074b3764bdd0---ranovirijufudefulose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+wife%2527s+lament+questionsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0005288e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5288E 5112 bytes
SHA-256: 33baf837175ba5f255f198694c953b6381284549555c81f0ac97b7f8ef4118b8
font_01_sfnt_off000539ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x539EE 11000 bytes
SHA-256: 2bdaf13d4eedcc9392300903e462ad581721ad83990f015d0ee35e6cdad52d5a