Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7119eee54752082…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 08:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2c9f72680ab66b2e2091f6a06c27a517 SHA-1: 033ca75be372c6430082cd2d793ca72576bcfd9e SHA-256: a7119eee547520828a394b97e2f6021e6f358ade6bd93f56347556cee59c217b
156 Risk Score

Malware Insights

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

The file was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL analysis strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16129c3b46daff---vimepojiridovok.pdf In PDF document text
    • https://bookatowncar.com/userfiles/file/barika.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/61804142780.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee3c9f2f1ec---70216160361.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fbf843543---wosusimuwutodopoma.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/xutugazipixusuxodek.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a841fd46235---98797091055.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135921e72387---jigor.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/crvv0fdobkh4q3c0dkupga6et5/89564935940.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/vejixukakizegopajaw.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/l37q19c92g4lagrhi3entbhcfe/3912894012.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/85130661677.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/55542566287.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/wowexodasofatatadozorux.pdfIn PDF document text
    • https://samtee.com/admin/images/file/bomamijexuvikuga.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160cf172fe3c98---nekokilatapetudosewijo.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/wodelulikifejewirajajerub.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/bejemowoletezeremumo.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/telerevikan.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/poxazetopilufuniririna.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/wotinesuboriwukine.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4248b5b2---2168052405.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=causes+de+la+deuxi%C3%A8me+guerre+mondiale+pdfPDF 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_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 19604 bytes
SHA-256: 8110be70aa5ca5ba3b77a5f988a66bae08ea76fc7c1ad3ccf354e7afc8e90132
font_01_sfnt_off0001105c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12873 11132 bytes
SHA-256: 5cf59795c21a9f42c8beb6297ef93c74d96e9730f227fbcafaa485c15e36721d

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