Malicious PDF — malware analysis report

Static analysis result for SHA-256 272ff5e8a10a2de9…

MALICIOUS

PDF

58.2 KB Created: 2021-09-01 18:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4a8bbc1d9cf2b2d73ff1a6d4855e58aa SHA-1: 812ef7d81c580dfee91a44aadcc0754db4202e67 SHA-256: 272ff5e8a10a2de92c4cdec2fbf8e342593b0188c086f666dac61be7fdfda9c4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://coretry.ru/uplcv?utm_term=for+all+those+years PDF link annotation
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a05ed67ef82---46032968586.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/55020614580.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160913e2a59c4b---zugip.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/8ff83298d7ab94ed8be9ad72f4590003/gekavufadibedu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3444ec3618---96788783462.pdfIn PDF document text
    • http://plenaseguroseprevidencia.com/fotosempresa/files/25303509867.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/fec9e5d5736f6d589e9ffa9e4396ff3f/76453968200.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/38799446326.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/1017611740.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/fugoketeme.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5a9109990---50951586543.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b94a463de48ce881fd5b2faeab3e509f/xajevor.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/69555105727.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/b67629f191ce9beb6f4350e2901224fd/8074464698.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c022126fa7---dukakafatisunejulabekuta.pdfPDF link annotation
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608722b36a0e1---72946933640.pdfIn PDF document text
    • http://www.polni.si/Images/files/61809408621.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/nuzepupanujoserufap.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210816032122207.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/42038680141.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/vepev.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/lobixerovawamakavez.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b77dd240f0f---73169489877.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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