Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a4f9a0837ebabd…

MALICIOUS

PDF

89.7 KB Created: 2021-07-08 03:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dd8743097fdd4c4d53181714a9a38b2c SHA-1: c56d56245b5704abbd523b664d24f273e65b4c9d SHA-256: 34a4f9a0837ebabd1c863104f71113033e6c4ec617df89a83c519344400cb22d
204 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious files. The presence of a 'password-protected archive lure' heuristic indicates that the user might be instructed to download an archive and use a provided password, a common tactic to bypass gateway security. ClamAV detection and ML classification further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094afa3de3cf---vonimufegavuwol.pdf In PDF document text
    • https://themis-lex.com/userfiles/files/2128281593.pdfIn PDF document text
    • http://www.vikingmaterials.com/img/jubijajudadazinigotegop.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607501e64b295---lalifiw.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/76597920871.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/gobudamoboba.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/1oiv9mp75po9c84ejg64kll56c/nowelemuwitexiliwasasa.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/63618761011.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/955dfc9508aa3056b48b536a124b436c/vexum.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f8c0bf6c2---70328782802.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/1d75d811f7bd07986e40dc13ebf91fe6/78918577577.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/wewunovidazibaripejewabe.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/dozapofojodaxazi.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/82025631617.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ovcdqcq5pfeahj594klm4ip908/ginefukoki.pdfIn PDF document text
    • http://esistore.be/userfiles/file/zaditev.pdfIn PDF document text
    • https://blugarden.eu/file/95494645491.pdfIn PDF document text
    • https://network-italia.it/file/31377898086.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/pinoxepepebivu.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/gojb2iueqga9mnjgaoqap90am8/vananejolujalumikezij.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/nosogarojixatefutifi.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d9bad6ee2224d92f9639f0fed7b4f858/kuxuviderigitizaripif.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caaa4a0d53d---13098148798.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af8de81f54---43426829241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=download+game+gta+v+for+android+apk+dataPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 17416 bytes
SHA-256: 47e299ba83df3f75f6ae9be4d3feee2a7bcaef1e9e0e4654c84fc3baede4e5c4
font_02_sfnt_off0001408c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1408C 10916 bytes
SHA-256: 9bceadd9d927c719f20e57fdbacbdb8df152bf657fb6d9a587cd1a55990d62e7

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