Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed19a45fee7412a…

MALICIOUS

PDF

105.4 KB Created: 2021-06-25 15:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 197bb56f3d28ba0ca5717e863c4f5933 SHA-1: bfafff2d6651e62d079fb7c21284b465d149cdbb SHA-256: bed19a45fee7412abbc319f28626009877ee011b6ca5a3ca8396762170cfc07b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious or compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf455d7a971---dazegexufab.pdf
    • http://jun-travel.com/userfiles/file/93617490993.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072628362263---jirixogibewe.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1903cc6e---40007589068.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/30503696737.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d7b3c1ab1314cc30b002a6b1ff74963c/57186520244.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa0a03714---setutunuwanigatawif.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb8e65cebb---85964972851.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/m7ppaabft0i25pt1bgtgqg0gt2/tibilavaxuluporekixivoneg.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c8d8458e2---sofubozujozaxadopu.pdf
    • https://mytekas.com/UserFiles/file/kowenu.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc16533b3---sowut.pdf
    • http://alexlunacoach.com/img/editor/file/jibajeroxalodelopetazub.pdf
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba60945afaf678129476dbf21d5fb78d/20543800403.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/878158cfac4fa944abe7886410a0bcde/xegalovadavaref.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/05fe44d326b9ae6fc1ae83ca1f418534/15075951164.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+cultivate+wheatgrass
    • 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_off000137b6.bin
0fb0badc151e8ef2e1c1476121c0390a7e65856d11948da84ec951c0d5d35ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137B6 18316 bytes
font_01_sfnt_off00016862.bin
147f25a193722589ee6d08a9e055a4464814d6c57f58d1d0647ad915d2865dc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16862 10648 bytes
font_02_sfnt_off000180f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x180F5 16792 bytes

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