Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ba165d16301801…

MALICIOUS

PDF

91.0 KB Created: 2021-07-18 22:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2a02d45dcbeb9e3d3999b6904cd8dc4f SHA-1: 8914b039613630c2a7520e860aa9a8a55a28e959 SHA-256: f9ba165d16301801b9d8a312295edf5d096fae370af8c8ea623e1a8c648a24e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute further malicious content or phish users. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/92094eb620a8e825a512f6434294e1bd/25703115945.pdf In PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160adf775428e3---73295403801.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c3a1d4522---70688357577.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/f90kv53m049kbnsq9hij9toltq/71315128738.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/57462e2ffe6f39a1925d55fe750fbd52/vowimativetokemowixok.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/h8f2qlp99l863auc3em2ufo2ta/nulonarusogajalefigasesub.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/75297016599.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8bc8055a8359c43f42ae1f4eab3eff05/33081504131.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/49874927403.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa55bdb054b---93126534212.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/aqh5g3p6iv7ocud45bo1or6qf1/34476281442.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/lases.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/sn5o0vl8vudntbhid7isigmth0/44690319004.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/fezekitekopejopagixejul.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607b3fdff0d15---15218555055.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/nc788bb1q65tfj1v6md5i4n8r3/binajibur.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8ff08104be945aec6f11ca1a180d6b37/66351186073.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/61631694211.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee95b7a49d---gaduzozajek.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/73910534526.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/nawazituduwenefan.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/10065080056.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/wikexidedatifasozuwavusim.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/28c1115c2b92a334e8fa3e09306c6e77/41676079522.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/u746ov4maljk7pik5qufvuavvr/45569219588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=undifferentiated+marketing+examplesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001018c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018C 17008 bytes
SHA-256: ab8fb1130814cc0c8cc2b9c991ee8caad27f5fa677af136c04928c5d247aa5e5
font_01_sfnt_off00012d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4C 10924 bytes
SHA-256: 97ff0ef43b32696d8876cddd968e8ec23c689cf97322d419711b0a52e2a10a1f
font_02_sfnt_off0001465e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1465E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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