Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ae1d00933bda53…

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 19:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 51dbdb22690386c30b40d1a6d3daf7c9 SHA-1: c73dbfaab99846f9aa780112a56318e0aa72d406 SHA-256: 70ae1d00933bda5361e7fde415fcb3bc43a9153c9f7b7a3035b670f2bef0f418
96 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of multiple external URIs and link farm heuristics supports this assessment. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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 http://canadanur.com/resimler/files/giraratofuzefo.pdf In PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/53565372330.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/c03ab86e7716176b8a187dabccfdae85/sevarusegikix.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/7535ab27e7fc3f30f786e740b4816c9d/83173109042.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/cv8ne33k88ngm98fv8apkjptd5/nidogokuzewizafubu.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/ruvimujexupijaxuw.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc2622826---32638162125.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/194155c79781e8848a801d3c1b29f8a6/pudolevepijujib.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab312afe8c---15130476746.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160997c31b2e77---15413907651.pdfIn PDF document text
    • http://immopolignano.lu/images/vozel.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb1743162---88420023906.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/db2bd5c3d323268f82e407850593878e/robasorebusegif.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/e6d8b391c51218b7d1c7f6771f331282/zuriwawiluwatolivatokiji.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/uoghuheppvf5m353723dj4r5ge/24721975596.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/8438180768.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/vb1sjk7q2ek4484gpuqml43rt5/bimok.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609660d8aead5---zetup.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/71262627876.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/82936183910.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/6810f54d9b8b23914acb9024c619fd03/83746470048.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607727475fe30---75060550692.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c82ea5a04---mimedatu.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9bae73378---fidijojelopakusukojepa.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ba46269f2cec1f39c445257d922254a7/39330405749.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=chocolate+min+pin+puppies+for+salePDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 15952 bytes
SHA-256: dcca846ef93ae19dbb31b40e0b10b2c757cfb2ff56aff61e855ef38f33b2b23e
font_01_sfnt_off000124f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F4 10876 bytes
SHA-256: 49d69a52707cc21a9ca78dbd11a062f357abdcdb387b5f73e5c394668bfc63a5
font_02_sfnt_off00013dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1