Malicious PDF — malware analysis report

Static analysis result for SHA-256 097a105ff5c7ceeb…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 11:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf3be4c298477c847929f1c40d78edb9 SHA-1: 715b8a4febeec07494db8fad80aebf6af60052c5 SHA-256: 097a105ff5c7ceeb196fb578cf7a908aa893ee6b1bd895b0f3403efb76abaffc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7260

Heuristics 5

  • 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
  • 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://oniceh.ru/uplcv?utm_term=diferencia+entre+verduras+y+hortalizas+pdf PDF link annotation
    • https://angkaganjil.com/contents/files/fopusajoponawejeludemi.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7626771340ca3a902a113f1759e5649a/wejap.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/93055703938.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/kilarad.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/koxifemexo.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/69695786348.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/us8na4qjtumppd3thikufrogl7/pomebufifemavokegew.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/93298684810.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/14781883854.pdfIn PDF document text
    • https://media-get.com/userfiles/files/13193584031.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/249f7f432c17b0acdea0725368264e15/kamovibok.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/f017fce6754473185f2379b36fcb5d3a/43727523494.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/13913047894.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f16c1d8cb9---36200335025.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/guwexulujox.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqa1bah0mk2jj3dr9ubh7cl68t/97466387366.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/42623762891.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/13191126782.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/16837785880.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67df466910---ribofimubofimatigexi.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/wunove.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/larixuranite.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fb4b5adab4b---4059713755.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/wivowivetojus.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8aa6756798---81695843568.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_off0000d835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD835 11056 bytes
SHA-256: c4a9fbfc05c6e34f9314fe748e854e855bee0de918c61017f9e567881d90c195