Malicious PDF — malware analysis report

Static analysis result for SHA-256 1478ca73ce958607…

MALICIOUS

PDF

73.5 KB Created: 2021-08-31 23:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 545bb8a85f07fe062f83e639c27f0d6e SHA-1: 2487c0cef5cab409e479673eb97d861b32ac83c6 SHA-256: 1478ca73ce9586071d5bc5cb5ccb7d7729a9e5dd2394ae5db0f98cc3f746c6c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites and disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing or trojan payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://absolutelyneon.com/userfiles/file/lewajalufebezaturu.pdf In PDF document text
    • http://geodez.com/pliki/file/mizekivoxekatomo.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/jiwinaxidukokoberuzikobet.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abae2bad855---vabodesepobokutubopegam.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f433b025c36---gojedidupomonajivova.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16073980f8a233---60600811751.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/sukov.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/batesuzafi.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/uretrll1t9klj8it15bs48gj4n/zosogexizexij.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2570ecb81---wuvofufog.pdfIn PDF document text
    • http://trendymamy.pl/userfiles/file/wuzuwuzorupav.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/9f017b33f470a2902e5c7eb5c629a4d9/zuzaxuvegaronam.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/66907447119.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/51684114469.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/55233990039.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/47647586771.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/835db6f01aea96e4e29b0842a5b581c4/69234907267.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c5ddf209c---velufoxim.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/59099844398.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/74386293246.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/xuxesewaxafifamarugek.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/bavupebaram.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fa5551523---wuzusadigopevunefipex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+apply+enchanted+books+in+minecraftPDF 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF5 11308 bytes
SHA-256: 735842aeac00e6fa587d8983befc188ea7572792462862d701b570abcc98e469
font_01_sfnt_off0000d61f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE31 16544 bytes
SHA-256: bd5450d91a80aaea2e03a8c1ed252e3a093de5d0158158cf2cd679481e9d15e7

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