Malicious PDF — malware analysis report

Static analysis result for SHA-256 0748d0b66ed2bb7c…

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 22:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f41aef3561ee005d0e874d471a403c30 SHA-1: 3d61a1a4dc125e7e5c1fef2bc4f367e16cc5d15c SHA-256: 0748d0b66ed2bb7c5b0ad3366a3b25b291bec3912faec4e2c6b38ef0714fe6f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories 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. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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://medica-eg.com/userfiles/file/rivokanevanepadolifekas.pdf In PDF document text
    • http://baigeleather.com/userfiles/file/69987550206.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/53305852514.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7afb1ba4e0---reruru.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cad3d15bf34---96825091057.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/0916d1f207b2d51f0915370f55edbbf4/62940692665.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/litosidizoragotumeri.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/25522276809.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/20615778891.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/gatedaterog.pdfIn PDF document text
    • http://cuatudongsaigon.net/uploads/files/xamenisokizakifulokupog.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/tumikevefakiwoxube.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b40445aeb02---momewelizegadatap.pdfIn PDF document text
    • https://noddy.nu/images/file/wasaxude.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/55327112563.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/6469201916.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/26468175168.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0af69f719---43050713060.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a8a7cd29---bafokazo.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/96988089904.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/2326321927.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fa5222659---monojiragozak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=d%C3%A9claration+sur+l%27honneur+de+non+condamnation+avec+filiation+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000d1ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD1EF 18132 bytes
SHA-256: a528066e311b299dda8932bb58ede1b967ff34c02c1dcefc58283cc57ea62e08
font_01_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 18672 bytes
SHA-256: 9761b8e5ab139f89125158abcc9eb2e78ee40328a4addfffea9bf415e92fde36
font_02_sfnt_off00011dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD7 11240 bytes
SHA-256: b5fdde1db313145d048cfe421aba45592eb7b778a43fe85b12573fc5a896ce46
font_03_sfnt_off000137c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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