Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec08c54a6c2448a…

MALICIOUS

PDF

84.6 KB Created: 2021-09-12 12:10:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ed365fed4ddee1be186268c1eaa02b0a SHA-1: cd524bffb199017e650d2a6b8fb8de24e0f8c14d SHA-256: eec08c54a6c2448a682d86fe51a9e54747d968cb675bfb0f2ae02de6b78c8698
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=how+to+change+keyboard+samsung+galaxy+s4 PDF link annotation
    • http://vigova.com/Images_upload/files/5642815257.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/porepejekifofetapi.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/29e5cc218c3b11c24cc81f5e29e6a512/56725448094.pdfIn PDF document text
    • http://ipcmanpower.com/admin/style/images/userfiles/file/15199830846.pdfIn PDF document text
    • http://jindi2010.com/uploadfile/files/wusevorifaxibimadazuxu.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cc66c55216c0614434c40faaff4747f3/kezazixufaxabofuralole.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/tmp/3395474540.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1de588863---pemekijunisobizu.pdfIn PDF document text
    • http://sun-tes.ru/files/file/bofezar.pdfIn PDF document text
    • https://chptravel.ir/data/file/89607124451.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/5bcbe8d2867f0d14eeb456cae51c4fb0/71937254465.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/nelubelutubeda.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb2de72c27---85236087217.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/nuvewevopugiveva.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/mejonanuw.pdfIn PDF document text
    • http://drtamerturan.com/file/97078088370.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/69232870377.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/9965f0b67d1f25596ef49ac5af9dc953/zepigunebavawur.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/kawonazesapanizededuma.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/zelebirusopeluwefasijan.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/tupukera.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/jikedadazorimigamovudux.pdfIn PDF document text
    • http://erago.cidees.com/uploads/files/88552300304.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/28465207064.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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 11428 bytes
SHA-256: 917a505738db8999fbfa68e22768d6381d9bed19a1c127e8e4e74844069b9950
font_02_sfnt_off0001166b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 17696 bytes
SHA-256: 2517a1a871f1bf693310f35eb09f75b1f3bc68f463e4d5707cead6c3d5e7ce79

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