Malicious PDF — malware analysis report

Static analysis result for SHA-256 752977d47080c6a0…

MALICIOUS

PDF

112.3 KB Created: 2021-07-05 15:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c00282580ee3a0a3270d6692ae7d0bf7 SHA-1: 6475a358004134c2a43f821c8d0db92f44329eee SHA-256: 752977d47080c6a0d5af0305c80921892ce0f136437a24766067db06e62af9c3
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to compromised WordPress upload directories, suggesting a link farm or SEO poisoning tactic. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users through potentially compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://eseninternational.com/uploads/files/wekijudume.pdf In PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d73d62c4b---vejavaponoleweso.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb68fb9305---lojagetofufojawexesu.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2de293f54---30884707314.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/lumukokumukuwuwikugarefad.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/e74d2786e903983df5bad6cf961f8254/fomixoj.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/nuluvowafej.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///nowajelobozalowebotupoki.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/pisetiviputimufigusowaz.pdfIn PDF document text
    • https://tusenfotingen.nu/anvandarbilder/108/files/10516903513.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160884885ae840---winezuxuvobazavopija.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160d54345d7600---siloxoruvasu.pdfIn PDF document text
    • http://www.tiendadelbordado.com/ckfinder/userfiles/files/22799901284.pdfIn PDF document text
    • http://autoset66.ru/admin/ckfinder/userfiles/files/31214961144.pdfIn PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210603_170927.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfdfeb30ef---60263869304.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/1f00dc1f55d372c7cbeb516d066f41ee/1309616105.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f046c66944---mewewibevinorelinorenepe.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f14b2f1cc9---46655547780.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/23461a3e4251dbedd830212e57544138/83270072906.pdfIn PDF document text
    • https://kildevangen.dk/files/99533780450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=typhoid+is+aPDF 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_off00015707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15707 18308 bytes
SHA-256: e3ae583f98b9963dce093f202ef3656ff9c4d94b93f57da12aeb7fb3ecbd959f
font_01_sfnt_off0001859c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1859C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DB3 10084 bytes
SHA-256: 23957846fee9f506ab18929093b10cd5e212b17612eee3b97a9c00620754d0d5

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