Malicious PDF — malware analysis report

Static analysis result for SHA-256 9644bc482f829e67…

MALICIOUS

PDF

70.5 KB Created: 2021-07-07 07:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63c020b78828d1db57fd673081729d12 SHA-1: f766219b2b71c24a854fe5d2c5f5f5e50aa65cfa SHA-256: 9644bc482f829e67580efdee62450356cc4f8eabfe1ffa8054f558c7a72d2235
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised WordPress upload directories and disposable hosting sites, indicating a link farm designed to redirect users to malicious content. The PDF's structure and the nature of the URLs suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609448bdc2306---20190750182.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1def39223---86784299272.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/773c4b05268edee6ff2f941d5828c491/34958604834.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/ogj13ib9mpqp5lja92tca7i3kr/falopodenekob.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/1907584d40226a0471f3a539fbf44890/xupekigo.pdf
    • http://bogelaipigeon.com/upload/file/xuloganajuzitix.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f57ab141e8---1823940830.pdf
    • https://paymentor.nl/uploads//file/kivejetupob.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b753e565d22---gaxub.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/4rpkhftv6otclb82lujgptmd3b/lapatezulelobavumijor.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/15a78cee07a624cdd62e633b836a66c7/97349386757.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/92fe81d7c7fba02187c8232c6d6fbc1e/zuligexojetigoxigu.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/at8mbdg8rdmfsb15m50qd2rkqf/bufobovimu.pdf
    • http://midel.me/userfiles/file/sibutefenar.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607447832ebf3---sumuwivovive.pdf
    • http://phaptangpgvn.net/app/webroot/upload/files/pulupirojonaj.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5accba1e4bda552713907d826904c99/47194264826.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/92d395b17fa5562b32a0d9e4da0d1acb/xelosuzelusefumex.pdf
    • https://hasekei.jp/userfiles/file/29610365891.pdf
    • http://atek-ent.com/upload/file/zumomarunefagogudaw.pdf
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/eaqdhdl6jvts2khjc87fgo5ner/38752462902.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b9c0f41f7---kojanap.pdf
    • https://iva-vietnam.com/userfiles/file/58755771201.pdf
    • http://challendor.com/fckeditor/upload/file/79806312303.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608409c514db5---juzeluzemadogirara.pdf
    • https://247hvac.ca/fabulous1/uploads/files/xonagonijerogopovepumak.pdf
    • http://maternites-catholiques.org/ressource/site-image/files/xonago.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=thb+to+nzd
    • 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_off0000b910.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB910 16792 bytes
font_01_sfnt_off0000d122.bin
6ac465d5afb6521fa6c501f0a9b9bcfc8d51121ddbfc50b361c0b6a31f49fad6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD122 15216 bytes
font_02_sfnt_off0000f790.bin
669f415dd415965a24e53bf579154ade2c392e47c538ae912b5b102e5606dfb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 9808 bytes

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