Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6783068ddc9ef7…

MALICIOUS

PDF

76.2 KB Created: 2021-08-12 09:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4fa4c11090f509e3a273a17352a9cba SHA-1: 3e5a6cf3a562386099b08ffd9e94a3d196a454fc SHA-256: de6783068ddc9ef7bfc41518707b00f1e61fdb589475aab2aaf7cc10a96550c2
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the exploitation or redirection process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hrt-foto.hu/_user/file/1150638597.pdf
    • http://staples1981.com/clients/b/ba/ba027a536d51c1d997ee76cae6dc9017/File/kibefusuwujux.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7818b3be1---lomoketeziwunenosarib.pdf
    • http://shannonlakeestates.org/fck_images/file/jagenoduwotamulas.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/hfi5lledrfr9ivtemdse80omjc/panonuzimi.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb86ea0f8fa---zadofarekodafux.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d33692179---gigewamuwowiwusedizoriz.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/hlj8u7ff3dkmutkits0nj5p31a/pepesatufibumawotezeg.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f3b790cd1---lonuduw.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/a38baa75a4f39f7dd2ef222817c8bc82/dokudejubopezarasik.pdf
    • https://stmarys-perthamboy.com/upload/File/gevuditamojonagowif.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/88f49b4ea08050c663cab4d06c703e7e/siroligufumo.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a68c2be47---16414111877.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4ffc494cd---62545992140.pdf
    • http://robedecreateur.com/img/files/91830310491.pdf
    • http://shahnawazonline.com/uploads/files/17829701708.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/3bc5859159e05f11abcabe369faba01d/bonumibetupi.pdf
    • https://southwestlooms.com/admin/userfiles/files/15582575505.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/818cddaebb4870e150f88e7358c64c2d/tupajofivetefudasonimaxe.pdf
    • http://marjoleintje.nl/include/userfiles/94238263442.pdf
    • http://hitecds.com/userfiles/file/watakubedepuxe.pdf
    • https://triangle-electronics.com/assets/userfiles/file/fiworerozegumonomesiwub.pdf
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210716115713700081gmn2jz.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/vn4p73mp5bpr7q433sj8c7a6u9/netodowenafifavoxeve.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085c02b770f6---zujezizilisuba.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=b1+english+grammar+exercises+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000ca36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA36 16792 bytes
font_01_sfnt_off0000e24d.bin
0c48e9e8b4f1491e687623eee9304bfedfdd1a86199d1fc820b4268e1f6516e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE24D 11056 bytes
font_02_sfnt_off0000fbb0.bin
08a79e7c93c3589389de72c2a2e5d2bb445b3461a1d563fbf5e3cc6fdbc43188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 16764 bytes

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