Malicious PDF — malware analysis report

Static analysis result for SHA-256 351d70bcfd55642e…

MALICIOUS

PDF

97.0 KB Created: 2021-09-05 18:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ac01ffc197eb55df0897aa9bd0635b8 SHA-1: e650bbfa1aa5e0296fb4e33e22aeedc9ff5f4400 SHA-256: 351d70bcfd55642e865485f45d540fa28114476a43b2f29a79ed20392c39548e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to exploit users via malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • 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
  • 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://desertofohio.net/clients/4/43/43f38f6e2239b09326489e1ba67fa1b6/File/62455018484.pdf In PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/87af32d812ec28652cb8b253aab4a03f/95041942916.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/l3cs7jobveg30n7qil6b8lb6k3/mofujemoveniza.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160f5583c89c56---newunuzifubotebamagifitin.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/86908865359.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/471692a8d31f5c17c2db1b3fb2dce62a/zefurejojaxipilunubibupo.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/pebixedoranarujubo.pdfIn PDF document text
    • http://bhk-aindling.de/userfiles/files/seruzeratidepudipopoko.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/60663589752.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c89939dbea0---fekev.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/ximalewaku.pdfIn PDF document text
    • http://iphysiology.ru/upload/49447663905.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/rttuflmd7ca0gcoh6nu99ubjo4/78352916388.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607d95aec2bf5---kegudezopoweresedijadew.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/nuwap.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd3263d6b4---31774896420.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/nujamefizasoviwenenepewet.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5ufoc253d8k3j70en5l8fuujt3/27842031398.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/42092757453.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/3311904238.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/41927101631.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/6e636f3574b3fb29e644f9f7f58710a5/netinabudajepobekonizipi.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/turukuwitixameruvozot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=governance+networks+in+public+administration+and+public+policy+pdfPDF 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_off00010f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12795 11416 bytes
SHA-256: 6ef26a706f59100f3c1c97d8761c31d237d047460ec052b660287e52d602c2a6
font_02_sfnt_off00014264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14264 19756 bytes
SHA-256: 18590cc3d3ed66466e190c51cc4ad4054938e1f8987b9de1cd9600ef35314973

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