Malicious PDF — malware analysis report

Static analysis result for SHA-256 7352c7102d572e69…

MALICIOUS

PDF

93.4 KB Created: 2021-07-04 02:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 74b4f3b49bb380c9aa72ffb6c1e9c1c7 SHA-1: 874c1e4003c3543c741abfe0162d5e0b4ebc910b SHA-256: 7352c7102d572e69dc8626a73341463bc9fa3860c1444effb35ba82c365b538b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://aymsoft.us/aym_image/files/metezu.pdf In PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/lozotupefefubav.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab0e759ffb---25558321999.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/rh2ddr05e33n2313a6f20tlc6i/85470931080.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fe54dd9dc---gibununonebul.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/88168665298.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/vixufuvalipeditewisufokuw.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/zidok.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/gobuxatuvikozoluvato.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d1af24cdb---94881925342.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/92893588923.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607f39a70146e---wumomilim.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/pitaraduraxorerozef.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae248c1f252---xivanowafawinikexilenuv.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c37f06acf---90014153945.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hui4uo87g4lbr8tdhao3g88385/81921694708.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/36909525355.pdfIn PDF document text
    • http://careerdynamic.com/clients/3/3d/3d9dba0a3645e5854abf1db7654b9c86/File/93849616888.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/3211801749.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/jqml4tl5jr0jqejmc6nnqfasr4/77341521601.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/e003874d6edf9d00a2f754a6034ccff9/memox.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/b57f448dd15cb59a88781b9bc67a91c2/jokexilupadofupimutuvipo.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/dodilegopanewizuvopoten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=lowest+temperature+in+india+todayPDF 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_off000107fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12014 10764 bytes
SHA-256: ec34c47584e1f478359f295ee5d570bc24e997cf6b55ceb9a8b50e60d2015ca6
font_02_sfnt_off000138e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E5 17908 bytes
SHA-256: 553f9ca3e0f88fcee7eddcce4e75a08fbe39cdcbaaa4986e0adb8b6c6c63bf45

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