Malicious PDF — malware analysis report

Static analysis result for SHA-256 7acb6b6acc7293a2…

MALICIOUS

PDF

78.4 KB Created: 2021-09-15 16:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 96594016127cb1f5ccf40699eec0b722 SHA-1: c5336d78dd04d34067dbcfc3d601f4f4e989f1c7 SHA-256: 7acb6b6acc7293a2327de80007ab8cc4c6fbb230c552111a5d48bf56010f6563
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crysiq.ru/uplcv?utm_term=kim+kardashian+hollywood+mod+ios PDF link annotation
    • https://foodvellythailand.com/upload/files/tolofo.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/8816212733.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16137fd56eece3---13799581568.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a81815300---peguno.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/bavuvizedo.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/50634125428.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109050006055601.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133a9f1c4b1e---58461420693.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/gonibubef.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/rinodowaj.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613551442f5cd---82038216991.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/6131791241.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/nanugegup.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/23555947917.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/309efd67bad9b4b124bcd40ddfaa1013/toxeviliju.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/81490876808.pdfIn PDF document text
    • https://ferropula.hr/files/tepekopirogiru.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/bevawaxakujogixupegiposo.pdfIn PDF document text
    • http://guchen.ru/d/files/56673313913.pdfIn PDF document text
    • https://zhansq.cn/upload/file/26484938882.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090719355068.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/duzijudomovazuru.pdfIn PDF document text
    • http://scantech3d.com/files/gibedidiseso.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/11217759028.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/tigususarigameliva.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/fakigenuvanavin.pdfIn PDF document text
    • 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_off0000cd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE597 10568 bytes
SHA-256: 942b8dc9f9daa7e84073ec2f5ad3937c948925ab2992d2e01894acdf90446fee
font_02_sfnt_off0000fd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6C 17540 bytes
SHA-256: 3c4054cd85901196e43a6b73ce090464b643796acb8b9a0994af1e66b55402ed

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