Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1ba023d6bcfc13…

MALICIOUS

PDF

75.1 KB Created: 2021-09-11 22:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4d9dbd3f2d6a77dff363eeb09b085df0 SHA-1: 05dcb543a28c09d0ba06f4e164747c1a3bf99b67 SHA-256: 9c1ba023d6bcfc130c2b0376478c1a9b0298f05a83fa1c879b37b7b5e8fbe790
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8226

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://learn-atdi.com/uploads/files/zivobudufiparalapiliw.pdf In PDF document text
    • http://4bzsoftware.com/Images_upload/files/sosamuwexoparutiviwewapim.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16139bf82937bb---7190280322.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/pixaxerof.pdfIn PDF document text
    • http://oembag.com/uploads/files/202109071329112205.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/161373e07128c9---legiwa.pdfIn PDF document text
    • https://kidneystonetreatment.in/userfiles/files/papemepuz.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/mivovofezaba.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/43827831533.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/tufodoniwijugonikili.pdfIn PDF document text
    • http://comitatoamiantovelodromo.org/userfiles/file/rajozi.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/59967226137.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/gononip.pdfIn PDF document text
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/waxejudukede.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/wotilekozalu.pdfIn PDF document text
    • http://alituncer.net/userfiles/file/89297312356.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/tiboginawawef.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382aa703ba6---62327836259.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/jebira.pdfIn PDF document text
    • https://aokman-drive.com/d/files/jinax.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/zedaverevu.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/99000144722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mini+iphone+price+in+bangladeshPDF link annotation
    • 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_off0000c6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 18796 bytes
SHA-256: 944123d3ffae74b409f318ffaf2521971124fac44ba0357f135d4f1bf1947c64
font_02_sfnt_off0001104b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104B 10828 bytes
SHA-256: 567a4a7ef9879ddba096d74534df52ee2304965be7f5e1a704bbb2a2bd4285d2

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