Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f29639c5b7704de…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 08:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: be39dd3e9c9baae896a4f17c29d5b0d6 SHA-1: 02fbf2fa8609bf37f0f87e70a50b9b7592a89ec5 SHA-256: 3f29639c5b7704deb333aaef5f430f91d7134c9b432c0c75a6661f3a16d5e902
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and embedded URLs point to a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inwebjor.ru/uplcv?utm_term=yellow+and+red+together PDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c67d9de882---34989249578.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/p22tvais02dqim0ateta29rmgs/dujigosizudomizonizekiva.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/44356043992.pdfIn PDF document text
    • http://medi-sen.com/files/files/39360017991.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092bf49daf86---zabiledige.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1a4569406---nagulamifojenaw.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5d5a5b8a0---20138143286.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/614e2b899f9e09936e5bf079afd2447e/ratofozobodivexiwasupeb.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb84b59ce8d---78455848553.pdfIn PDF document text
    • https://kermanrooz.com/img/files/nomurigobujakagap.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/vokaladapixurutamazupu.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/62747578449.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/puxanetu.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/34498500628.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cefcd7e0---wukazinixewujir.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/45597282854.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/98224765669.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/23460333737.pdfIn PDF document text
    • http://stefani.cz/fck/file/89846693910.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/fabovesaruki.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d0205060---pudotuvukovipaz.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eddf8fc6515---52954547658.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/walagotamip.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_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 10336 bytes
SHA-256: b118d1a3e2ec22767e4ca7255e4b69330fcca1c2b04efe307ae64d40fe6fb5a4
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C57 17224 bytes
SHA-256: 4d493c1a699e9c718b2b3f057a22ab35cbca3389b745fa81f0a991a9f2b9022b

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