Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a6b39cd34cb7e1…

MALICIOUS

PDF

80.7 KB Created: 2021-09-06 00:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbb69ccc0912507d75b0123c7fc81b31 SHA-1: a29b770396f68a778ff772d609036d3a22695164 SHA-256: 49a6b39cd34cb7e17f63d4fa56e9c135768f2e1300f3fc49b4def5c111614825
164 Risk Score

Malware Insights

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

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to compromised websites and a visual download button lure, suggesting it is designed to trick users into downloading further malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://electrabicycles.pl/app/webroot/uploads/file/16222969876309.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0d4a4dc7---zupapixemimixebabowoxiwa.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdd9a9bf5---13611754683.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/0ee2981a3c4d274c904db5af3e98fcff/lefapis.pdf
    • http://zabradli-znerezu.cz/userfiles/file/visejinamuxarugop.pdf
    • http://fxmeat.com/upload/file/233add2c1fe42e8b0f6c230ba9224921.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/4285542207.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f5b718fac---83199584685.pdf
    • http://eotp.info/sites/default/files/fck/file/711723441.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704567a3528---pobodasifogawoli.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8f79640fb---volanunefofa.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160fae160365ed---vupejovemonamezoginamo.pdf
    • http://mcutech.net/upload/2021/06/file/16240446451315737900.pdf
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/gutuneginake.pdf
    • https://caraudioshop.ro/mm/file/21367686672.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/342c622dc428119d15bf3958040e2b65/japado.pdf
    • https://carrieres-pierre.com/userfiles/file/runigevamumuwebumodeji.pdf
    • http://langeline.com/ckeditor/upload/files/51097038756.pdf
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/sukobenujalunetomarebuw.pdf
    • http://cuacuonductudong.com/upload/files/68988397335.pdf
    • http://fsanaq.com/upload/file/210706054524679626ns52i0w6578h.pdf
    • http://muzeumostrowiec.pl/obrazy/file/nuzawofetunum.pdf
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbaecbe232f73ec71197500c5c27a0e6/somipopo.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/f729cdce4a8875c12dd3f18bd77606ba/seporebojevoze.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a21a3b96607---dizavofijufewumixutitumo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=nmu+result+pdf+2018
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d601.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD601 16792 bytes
font_01_sfnt_off0000ee13.bin
b431c4dcad166a6d9b950927dfb911e349d497164dde28dfc4c15ff5f5a6e642
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 17988 bytes
font_02_sfnt_off00011c45.bin
e77ccc0006821d8fb8e984d187dff07afad0db8230f8596ad37ebbdaaf707197
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C45 10760 bytes