Malicious PDF — malware analysis report

Static analysis result for SHA-256 a262054193ad0ae8…

MALICIOUS

PDF

140.6 KB Created: 2021-07-20 06:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f14aed041ba029e92120f4059b242be2 SHA-1: 91fa0dcfd10ac22a172ed4e20c969b6bef5f0f0a SHA-256: a262054193ad0ae8185b494a6cd6e880c2929d22339fdd9d1c6fb4d1dbfb5048
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the PDF structure point towards an attempt to exploit user interaction via embedded URIs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://opuspointpartner.com/ckfinder/userfiles/files/nikefonixufapar.pdf In PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f236665ba7---tawezagelep.pdfIn PDF document text
    • https://htchninc.com/d/files/rupiregivoxilanozutad.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ff1d280d2---32655348989.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/97599318258.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/551246022ac6891fd84cb4f5b18fd3f9/60079578078.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/52498214506.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/efcuho1mls4q222ca5h3lun7v9/wemifosikonurefakobalasa.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/d03b3b841244bc6a7c8d3b5f5c81de7b/14470448725.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b6abd3edb---kezibigasowuwesinuku.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/89999533144.pdfIn PDF document text
    • http://wwstationery.com/files/file/naxagerafapamosu.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1609b69441f680---nanuratapolafipujidozofa.pdfPDF link annotation
    • https://locktactyuma.com/ckfinder/userfiles/files/zedadoxokuxavufinuke.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/feranosoborowozuxe.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b54772a46---bikuwijemolo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccfd01e5c8---sudijusomewuzevo.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/053fb8756c2f33c64f71d38cc4f55509/savufejinimivoremitasuwid.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/a22b14caf8e37294a100d02c6b64144f/78817777732.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d924944e2e---kufiga.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/jofiruxoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=sense+of+self+meaningPDF 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_off0001c3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001dbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBF2 18524 bytes
SHA-256: d2e4ecced041c5df4ed574d4bbecfea2f2ba1dcb57a0bbfc8ee8cc8c275efa3d
font_02_sfnt_off00020beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BEB 10432 bytes
SHA-256: c722a628f4813795950c3506b7b6551ffa19cc7b5c7b8194d148d1efdd242dc1