Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66bbbb461ba3d05…

MALICIOUS

PDF

87.2 KB Created: 2021-07-09 22:36:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a357f80d3c7eb386ccabd2d64d18e883 SHA-1: 610863c79fd6930df3b2e79fdc6de0d442825613 SHA-256: f66bbbb461ba3d05c8bfd20facba4bbd02880f8239df6e435e24c78f9b66126c
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites. This behavior is characteristic of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/4464f9984bd0fee3e8c5e2387c489c44/43747150309.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45d808dd9---42750792075.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/578b41ad35283359114643940997d620/vukogumufijikumezokosub.pdf
    • https://francoisdaulte.com/ckfinder/userfiles/files/tupirodunaneg.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f96a11251e---xikevadodagulan.pdf
    • http://capesociety.ca/uploads/files/68855448220.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/0dcfdaa9845bfd3fe0d41206dde2e287/tivimudarolona.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160784af26877c---85323804705.pdf
    • http://thunderstar.cn/userfiles/file/20210504060534518253775.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b899689d2c3---17048750316.pdf
    • http://aldara-latinoamerica.com/userfiles/file/neriditalevasopaxi.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad61a00043b---16544026161.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/27aeu4dln9vig964qhopc92gak/17042557129.pdf
    • http://vmkmsz.hu/userfiles/file/38486850000.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a99ea562ac1c1829dd6ecf0a820d1d2f/42810883616.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9ef89570c---80263580871.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e7bca6d23---tejusiwa.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d8a09376a35eb85a9a0c1aa53c6942e8/1456737526.pdf
    • https://armagedonspedycja.pl/files/file/28020786297.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16d886b74d---67016649302.pdf
    • https://schmitz.cz/res/file/lipemu.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160adcb2e9d30d---kepemowofolurewaj.pdf
    • https://biogenetixpharma.com/ci/userfiles/files/26185784691.pdf
    • http://misosmile.com/upload/editor/files/7182713833.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfa49e6d40---larimopuvigojigajexob.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d80130b47acd341ad19133c579095794/11118148419.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d267f5cd26---33788592634.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=angel+of+the+north+sculptor
    • 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_off0000f3ee.bin
0427181d6b28e4d9a9fd26fe83472c54c8ad948e0080b7556b8eb693a9924a30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EE 16684 bytes
font_01_sfnt_off00011f15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F15 16792 bytes
font_02_sfnt_off0001372c.bin
46fae0b50e2fba359fb1926ffe8aa4022d15cb8615f34a37d0fdafedaf16e59f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1372C 10588 bytes

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