Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b7f9b7d881be74…

MALICIOUS

PDF

91.2 KB Created: 2021-07-25 19:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8962f912b081151699c7d23b31cf2d2 SHA-1: f0a1a85ed7bfb0066cd230b491f9dc3fb3c0637b SHA-256: b0b7f9b7d881be742c84c9f9d649218c1d37ed5226cd30b9ec6a3d63b6c61f92
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, strongly indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. The presence of a 'download button' lure suggests an attempt to trick the user into clicking a link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kameleonhastanc.hu/files/file/gatenip.pdf In PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2678b138f209ad6268c47fddbed93960/xujujepalisuxomidola.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160774f4ee7357---tujuwojitobix.pdfIn PDF document text
    • http://citra.cl/userfiles/file/mazirovi.pdfIn PDF document text
    • https://scanclean.bg/upload/ckfinder/files/31808620237.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/givasaferanepa.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/kisakosipo.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/2d797dab8e7ddacd380fcd7a6bcb36b7/lejepafenujuxulikofisu.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/39267868920.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/96794820140.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/66265469082.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2ef4061b9d---83480048993.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10affde927---927806855.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aa0200392c469dcb288763e179c564b1/22009332871.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/2f7941a45e2570f6afad7d442d25c326/11514267744.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/denozole.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/2ed272c7662030f1471b71259608c5c9/jupivenerusizekofelazeli.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/luragovopibojapugisajibu.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1eac90f2a268bc4722a09a80a86e0569/9098777086.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/57493866397.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/1070289023.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b091e4920f1---vaxofuxiwinodenexizobar.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/78223850350.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/9602675691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=taken+2+full+movie+in+hindi+free+download+in+300mbPDF 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_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 17040 bytes
SHA-256: 0fb72001265cbcbab93e07c803754ea78a0dfb52d7f9981bf52aceeb3e1a2bc4
font_02_sfnt_off0001446b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1446B 11216 bytes
SHA-256: 731f66e1eedf058439662e20e76592505ed93e4e5bd7783baa20a82d6a4a7ce0