Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef8118814730305…

MALICIOUS

PDF

94.3 KB Created: 2021-06-26 04:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f9ac77f3f9b385abdbcbd7e8162bb7e SHA-1: 7d3e188ff664139056f26c17487317f26615af4a SHA-256: eef81188147303058790185ded96c64f36acd50e4036c24255ac580e19eb3657
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4ad9244a1---73012284756.pdf
    • https://penzionradvanice.cz/res/file/kasalemexotoxi.pdf
    • http://absolutelyneon.com/userfiles/file/48606471640.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/93a267dfc20b783a143c4f80a39c52cd/94119076794.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4bd0e4bf831912a2084dc800984c9d77/wikatexitubilugajagupu.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/c9440338d5c4789d2db91b7ac53f9856/64776738763.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a320829229f---vibawuwiravazumaxab.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f9807c8f4---jarusuxufusokabeni.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160853f85a0647---25149098703.pdf
    • http://donghozibistore.com/luutru/files/1435006722.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/i8gkt4jhfgpq2u860nb46mmka6/sameruvebowiriw.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/3d8f127d58f9741d4819530e230ffc7b/67891323022.pdf
    • http://atek-ent.com/upload/file/zofok.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609297ebdc9cc---bididodenarutibitapa.pdf
    • http://innotec-industrie.be/userfiles/file/62074026652.pdf
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c28288d0db---vabazetukaxulavida.pdf
    • https://gencshoworganizasyon.com/upload/ckfinder/files/13608072026.pdf
    • http://usmleworkout.com/files/file/63368920672.pdf
    • http://flexicourse.cz/res/file/nuxewibijilewur.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f34c075466---41724383097.pdf
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/dd7a512fa2efb8b6a5915e19b4700caf/neserosatiwopoxejowig.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/635cb944248df4418d8320fdd6e9de8a/pijajekazuzivarewiwowu.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc927bdc1---runan.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/805f57de52072e1cbfd37273af85037f/telunasudoxetip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=jamaican+braised+oxtail
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f1ca337398290ed0d223056d52251b9b/besifega.pdf
    • 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_off00010d32.bin
fe9373d53417ee7d5e8cdffe0e714fbb654f0e39f0f35f71d1b2416beb59a2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 17676 bytes
font_01_sfnt_off00013b43.bin
2492d24814bbea21e1513d04effb161bf655a1a40633e2a17b2659f457280640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B43 10764 bytes
font_02_sfnt_off00015408.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15408 16792 bytes

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