Malicious PDF — malware analysis report

Static analysis result for SHA-256 3047d107c5335f3f…

MALICIOUS

PDF

86.8 KB Created: 2021-06-27 05:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3d084ff56a4639d591161b5aa7de14fd SHA-1: df9394eaede22716f2a2f2ff3418b77bcd69f413 SHA-256: 3047d107c5335f3fd004cd91c83fbb9be9e800ed3bd397d5e7d87ca120af5ba3
164 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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 https://archism.ru/uplcv?utm_term=cold+climate+in+india PDF link annotation
    • http://adance0112.com/upfile/editor/file/diwelovapotixiruradema.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/sufiro.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/sigelijaj.pdfIn PDF document text
    • https://medtek.vn/storage/file/dixuvawowasarazenu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1d22ea7d8958ff45fd488e381ec83595/46604316131.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607381aad1052---9508570536.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/b60a34a080e44918ddc3668181076ea3/mufafoxobulow.pdfIn PDF document text
    • https://tailormade-sales-marketing.com/userfiles/file/papamoniraverupi.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4b5560b53517089da4a575b01f753ebf/forajuzotexedexinetejor.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfe1798fd5---sanidufuvudapiwiramulise.pdfIn PDF document text
    • https://afayl.com/userfiles/file/ridinemikimowifumomobi.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c90eabab52---kanitinixipexubeb.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/6cqldk6msg45t7n02bu810ql17/20952111555.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/15607ce66fa39647e9c6ce97a9273bdc/5197485083.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072102bc1f34---nimisudufu.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/eb6da6fb79237740a0d1fa5c7da545da/nanegodazifad.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607806174a26f---kuwibodapixevuxasotujavog.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/jatazuxik.pdfIn PDF document text
    • http://kingnature.ru/files/files/26369262432.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmaup2hh3mttlluvpi948ane51/gupifilom.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2dadccbb9---30486757206.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/pftoca1upguiepiab656irjja6/gelop.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/34921970467.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1c6f2afc2a69c6721bb2b9a2895045b5/37555572622.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vd5eo89p23uvghahs7kmbtq1mk/gasotitogilisuw.pdfIn PDF document text
    • 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_off0000f21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21E 17128 bytes
SHA-256: f7c2427b74c6cba56cb68c13e57731bbe4751d2668f48efd5f245bb665e787fb
font_01_sfnt_off00011ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000136e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E6 10292 bytes
SHA-256: df2bec22ea796c1154578755f43b45055ca63b1cc8983617a08f3defba050740