Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6f0d3979ef43bd…

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 14:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1c35d4f4de189ad36abb2da074381213 SHA-1: 3c086863643ec033205cb10b773b343aac636ca0 SHA-256: fa6f0d3979ef43bd98d40623308fd1e8bbb7cc4f6e4fca42ea12595bf2401e20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://aromamahabaleshwar.com/ckfinder/userfiles/files/88585687092.pdf In PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e0de517a773---gizukujupaw.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/xobepozibafubavu.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/samasaxenasiladekumofepe.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/22731315088.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/72335039059.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/29447165340.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb6fbb47e8---pigezijoxeko.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160873a2a94d04---29263460944.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/25740852869.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad048b7412a---jekepufefuwigube.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/vi5jijsu7npnivhgsfbrkthqa5/kuruzewuranunozo.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/wegetekixoniwoparuzixa.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/bajamed.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/11801871573.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca17d080b---taduvubabemazire.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/besugawelidexetubojogepu.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/73dd97273fe76d66cec5f6a42d729461/nemewe.pdfIn PDF document text
    • https://xigmatek.com/upload/files/xigafigoxud.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/231555158350.pdfIn PDF document text
    • http://adasbruiloften.nl/userfiles/file/9897844099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=citomegalovirus+trasplante+renal+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_off0000d83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 19388 bytes
SHA-256: 463aba5cf73ba510036756534a1881e768d1eb741558ca02a78a2b0d1fb6f6b2
font_02_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 11036 bytes
SHA-256: 830f7847aebfbb327d8dfa50e1fbc9d0bd7295565491bd52f3ccd40d765ea434