Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d10f2afb4ec2605…

MALICIOUS

PDF

80.1 KB Created: 2021-08-20 00:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 34a1442a4cbc70799c2159d10177b3df SHA-1: 992fac17204d4fe4fef3a408b54a5b4688384c9b SHA-256: 9d10f2afb4ec26056a77b4f2bb8dd24e66095211de1552d8341e581ace503d71
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and numerous external URIs pointing to compromised CMS uploads and disposable hosting suggests a phishing or malware distribution scheme. The document body is heavily obfuscated, but the overall structure and heuristic firings indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/samofavizugodovexorika.pdf In PDF document text
    • https://khanikango.in/file/dojidakujanojatoz.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/55591164061.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d9d9224c86b---5242212450.pdfIn PDF document text
    • http://royalleasingny.com/admin/images/file/kumurofitelekisused.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b796098b05e---17720295589.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/fe4ff27b375afffb4bc9a9f6724fbfdd/goxusozemu.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/tidebokofuji.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/lixisodewugonaz.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/37051459461.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/zemunisegupiwekut.pdfIn PDF document text
    • https://onlinendttraining.com/files/kesakufusufisugoropozoj.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16086ad2db85e6---95638765158.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4984e47932---mubizekenawiguza.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/d51c10e9041cc83613b2b3e3de7ff5cb/buzadadimij.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/5537062865.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/wesodakararififamorap.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/84071077781.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/mghkmrolqtrl2u9d73p2q7cd8e/jevamu.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/fizakemojopabigaj.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/53649535385.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+oil+singer+tradition+sewing+machinePDF 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_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 10896 bytes
SHA-256: fdf4c0ed909cfdec32f653f70d37c11dd1a84cd9d19d9940fc621275f7dfd454
font_01_sfnt_off0000f039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF039 16428 bytes
SHA-256: 94feb87ad29480a7325a5c3b2dd07743e4e2e635763ca20f91605f834e0218f4
font_02_sfnt_off00011aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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