Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63cf6e1a98eac27…

MALICIOUS

PDF

84.8 KB Created: 2021-09-12 19:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7a9f4bdc7df36542f319c0690f6407f2 SHA-1: 6340b9f6d9d870031e8c2db3d8f205a1c2ef4141 SHA-256: f63cf6e1a98eac27a8da31602e91bd3d25004ea7fa85944061d5eb6c61ec0f02
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ipceurope.eu/assets/file/63833226618.pdf In PDF document text
    • http://ngor2-3.com/file_media/file_image/file/newelokasepex.pdfIn PDF document text
    • https://songhongresort.com/img/files/jisarorevevufogixufaf.pdfIn PDF document text
    • https://ovistar-dz.com/ckfinder/userfiles/files/31213198570.pdfIn PDF document text
    • http://screen.by/images/file/39575136996.pdfIn PDF document text
    • http://dietetyka-24.pl/images/files/72270164699.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/lumurozedefipeganovoba.pdfIn PDF document text
    • http://varadimasszazs.hu/uploads/files/giwudut.pdfIn PDF document text
    • https://quizai.com/uploads/files/bisedadafebijuk.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/muvotigut.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/q6bc7t9eb1ou7caos3oc3vovl9/61365906447.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/kinetugalifuvokekuxagep.pdfIn PDF document text
    • https://kalimati.in/userfiles/file/mipere.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/82373353503.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/13425883588.pdfIn PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/tazabugirasamekosuze.pdfIn PDF document text
    • http://generaldistco.com/images/file/pogoruzadi.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///lagodezovusapegetovube.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/loxibekupumamolufexov.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/litarapuresuxewejedil.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/91154254918.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/i6n3pp14ucbh6v28j0h2geco0d/32066619490.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/36414599301.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318c7c7e196---kesuvobawigobudibow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+do+i+print+from+my+android+phonePDF 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_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 17620 bytes
SHA-256: 482de383451b74d65579d8883cc0268f2b2bd5de5cdb8be8d4e62a72451e2237
font_01_sfnt_off00011530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11530 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D47 10740 bytes
SHA-256: 9644904aefbd251bd9f7f3f4ea1363dbf6792424ea8bcd2528969bf2b193c669

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