Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08e6fe311f1b3a1…

MALICIOUS

PDF

89.6 KB Created: 2021-06-30 10:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3c3e30299a2d888f598669280003ea8 SHA-1: fe2eb0797d945dffce064972b79fe9c5f5761499 SHA-256: e08e6fe311f1b3a10bbe0369a4c069f2c5f1c1e5c80984a41eaf952f0d771262
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and a machine learning model indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads, suggesting a phishing or malware distribution attempt. The embedded URLs, while numerous, do not appear to be directly executable, but rather serve as lures to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b0e96630f---rotaradagilelajidebi.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941e6609dd8---90601085508.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01a391596---lirafogaxiwopodarebaxe.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/419cc858ee4a212e1173bea98dc4cc45/96501693490.pdf
    • http://zaun-produzent.de/userfiles/file/73289379916.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc58c0ba2d6---xomosipagopetebomavure.pdf
    • http://conblocmanado.com/pics/file/xajotodefuterokesat.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609daa236c371---kugobisopofupubup.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/6ccf5ee8f68b54996515151a4f67875e/dasetagosigotimosut.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090973959d22---78398611199.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160742d58a23c3---28634927819.pdf
    • http://bawaconstructions.com/editorData/file/70956575100.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f49fb7bdbbd78cde71512fbdb212de4c/55323013276.pdf
    • http://santeh.md/img/files/xutinovumorumiwizoxarif.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d64d6af01---dajalikivek.pdf
    • http://bodegaadrover.com/userfiles//imagenes/newategewop.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/c1be3af10b2c6a93452c41c952383a26/viwebesapebalofusoxili.pdf
    • http://islandpointfl.com/userimages/22276478350.pdf
    • http://csc025.com/userfiles/file/20210621141048_5jtn8f.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/wipowulip.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d629c569d4---83882076599.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad6a16883c---nuxikofusovilidejokut.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/m51oikp1bh7gisj31idsm2gtl1/57577196204.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8b2106b22605f67a94e0282598030f42/58832048716.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=the+demand+curve+faced+by+a+monopolistically+competitive+firm
    • 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_off0000f845.bin
a566af496549d2e1112a8a053586b3594d999e10b279edf119bed24facb9a881		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF845 11268 bytes
font_01_sfnt_off00011250.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11250 16792 bytes
font_02_sfnt_off00012a62.bin
91c08f549b907633ae54bf04675b36c8df5ba90bb201a2ba5863029db6643574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A62 17728 bytes

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