Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ee65144e5809af…

MALICIOUS

PDF

90.1 KB Created: 2021-08-26 00:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 762b9fefaff721faa1504af419824bac SHA-1: b2adda82adbcfda708ce1ba48ce26568e7c9ae24 SHA-256: 07ee65144e5809af4e46ae506a0f4dfb2d1def76477ca3169fa8201af85c2c1f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://krisoc.ru/uplcv?utm_term=wii+theme+chords PDF link annotation
    • https://nutstudio.it/userfiles/file/64298995074.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11746861095.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/86nvq047vj2l9b7adusaebo353/29389053538.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/83d6cceab0bd2de8fd423e0ffee34260/kovepiwazilevezeviv.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad53c2cdb7---jalutulopafejufudisijuke.pdfIn PDF document text
    • https://xistenze.com/files/files/riluzuperifo.pdfIn PDF document text
    • https://arerp.kr/data/file///lobusadefisodipiwas.pdfIn PDF document text
    • https://506hlapeta.com/files/file/subuvapexovebixugam.pdfIn PDF document text
    • https://tasteadmin.com/ckfinder/core/connector/php/custom/wysi_uploads/files/tudelerajolavo.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160849733114c2---22832855339.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609812fb0d68b---82422666228.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/mivogizugo.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1629500225.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aac937489---95451112128.pdfIn PDF document text
    • https://led7.ru/file/rogonimefawelobikerixi.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/dutafafedevelonupijezeko.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e9cba2eabab4581b3c44828ead9e7055/xolurulu.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/jepulilekujovuj.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee526ea13ca---31570441643.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/59413050094.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d327b3877b5---didoraxazelad.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/rejow.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/cloqd7jnisfiumbb9uob0ebb6e/37018667211.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a38f0991486---lukiwukexejikitexuxidewu.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/xeravewaze.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/56977907432.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/namobigamavikefuxepexavi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 17048 bytes
SHA-256: c84587ba72ef84cc2e582ed46b1a65ec6726498a16aae19358e76a596fa6f505
font_01_sfnt_off0000f83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001104c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104C 19052 bytes
SHA-256: e3502d30e589e068ca886524f4a8075f05da5c9eda0419a4e20e20884e9072e5
font_03_sfnt_off000140ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140ED 10316 bytes
SHA-256: eb30aed52c91de43f896d980720e3a8e9569906759fcec8d0d109b470cfb8b2c

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