Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c541c81bd67bcc…

MALICIOUS

PDF

87.0 KB Created: 2021-06-25 20:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b13e788b3c3b98967ddfb992f76fba2 SHA-1: 186eb923cb5d0eaaa86553f9d085a13fbbeff866 SHA-256: 11c541c81bd67bcc8b3019f43333758b410f37104d23d2ac4c58f969517b12fd
204 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF contains numerous links to potentially compromised websites and uses a lure to trick users into executing commands via their clipboard. This suggests an attempt to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://businesslife.com/content/file/34672000433.pdf
    • https://cecprint.com/images/file/36222089588.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070ccf5ef959---guzevurinobol.pdf
    • http://consol.hu/images/uploadedimages/file/65989676451.pdf
    • http://sahrugs.com/userfiles/file/90023693982.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/2fa7f03f6827fa6c160cc223fe8c1ed9/lunogevajetifonekek.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc16eb9a61---86061704828.pdf
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac735187253---gutopedovarazuxegudopeva.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c04ae95ad48---33395999417.pdf
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hml7osgrchc426odrvnk9hf881/zutijitilurebutilipogom.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/77531ae97d7d88344643ae6ca8aad9ef/jemuzebux.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/torugokefetibazujotepi.pdf
    • http://automotiveenergy.cz/userfiles/file/58508161120.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/0420987812bcf66e06ece41f8cd04f6f/nupofusoxuxowumukol.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831799c04d3---rokivavubotuvejirimezaw.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6afb69aae---54260512295.pdf
    • https://b2cexpressdemo.com/userfiles/file/labaxowajegobiw.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608932aa6e3e1---mesonozumuv.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/btnb69oimdni0rrhs08367sfmd/70887366829.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4363bbea43---66098759064.pdf
    • https://egokituz.eus/files/galeria/files/vesasevibunotov.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/c58fcb4496485e5319a7587cdd7086fb/23990848112.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/336fe27e9c0a289bf11252d3f2fc09fb/bopajefix.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e614eed3b---28300091812.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=add+picture+to+pdf+in+preview
    • 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_off0000f053.bin
6bced22c12d6c84872f0270bc4ae28bc437f3c0a8e0ec67b237fde951a2d5893		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 10472 bytes
font_01_sfnt_off00010848.bin
a448ba56d6470d0666a50403969cae5b358ca7888719a958e6a4a3d505b04bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10848 17608 bytes
font_02_sfnt_off00013679.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13679 16792 bytes

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