Malicious PDF — malware analysis report

Static analysis result for SHA-256 74257fc15cf30e0d…

MALICIOUS

PDF

90.9 KB Created: 2021-08-04 00:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7857f939e0cfec3954040d983c44db05 SHA-1: eeae9a1cca7cf7e33ec18cc34d0f7fc0f747c79d SHA-256: 74257fc15cf30e0d9de6a1f8fbd5e334a39ad6c338d12c5be819579e984e7544
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing websites, leveraging SEO tactics with terms like 'how to play mario tennis on switch'. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://garglob.ru/uplcv?utm_term=how+to+play+mario+tennis+on+switch PDF link annotation
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/vavhhi2rvh5aopprteh5valpe6/wudozosili.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/d9c76b2dd87df28470ba38286c0cdb50/pudokigeronofo.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/83538234901.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/n3qtjoqucqevnl5fu3pnis7keh/rigunowenapekep.pdfIn PDF document text
    • http://gibson100.com/clients/870224/File/94939232759.pdfIn PDF document text
    • http://qhs1978.com/clients/d/dd/dd8db5a278a7ad55a2ada34b8e38ebcc/File/xokinad.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/setigorizavovixu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c52588a54ce---63218260086.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b4c16c0fb---wajix.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/betemupuropedugelokujotap.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/goguvu.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/v9sg5s8lgnpe87hcnpef85lclc/mupofufap.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/jewiboxifugu.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/dopufivetolugofox.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/boxetolot.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/07b1831c7db105602b4c2f80a4622442/11466525011.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/latubuvalizumud.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/6405071173.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1kct566esne1en8d20iagi0013/jeferug.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/mowebadusaxeku.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/b28998e570db024d0bce4a87ed6c6a1c/wixejasol.pdfIn PDF document text
    • http://thegioituigiay.net/uploads/files/jovadijirupaxedudovibotap.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/9367792675.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/13870060985.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b59247dd3ba---wajukogezo.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_off000101dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DC 10832 bytes
SHA-256: 5a4cae58bd8114af3ed665d87f95b182b52341350bbb2ca37f44969542c34488
font_01_sfnt_off00011ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C5 16664 bytes
SHA-256: 04cf6976aa5811f2850e3947832e442fc142bd3e9a504e89462bfe2038c9ba5c

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