Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb02979236fcd14…

MALICIOUS

PDF

84.7 KB Created: 2021-07-27 06:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 806c45390b2d321937be1f97037229d8 SHA-1: 904af4670c1967c9e5a917a29800f4c92de2abed SHA-256: 4bb02979236fcd146318a10e8d16baf0727d003edc48d87e47a67373bfc47afa
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO poisoning tactic. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a3744448b---90580236176.pdf In PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/64813164388.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/50173881515.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d480a7486---kodagevivonadadapaxave.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/8ea3i1fv5eagmav773hevjcsh1/pibogojupabixev.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b56243cf15f---65526179865.pdfIn PDF document text
    • http://vertracapital.com/uploads/files/3698322340.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/wonizaseludusoxurusekum.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/rugepuxugitugevivok.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd3f755fbd---lejesobuwavugogiba.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/miboxefojakopozexokok.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/zazexegenag.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/29186162655.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/26664696574.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f09afa8ad3---xozivakonozepemib.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2b088033b---xotameraxer.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/89404977325.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/9506232495.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/33217888085.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/66006300011.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a700b679579---17733737663.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/84532859200.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=programa+para+baixar+musica+do+youtube+em+mp3PDF 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_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA62 11336 bytes
SHA-256: 377daaf957d12cb0e71fdb037713e4600c277c51a2c05ec22dd00a1f1bbf5490
font_02_sfnt_off000114c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C6 18132 bytes
SHA-256: bbdcae6a240075d521db5175e05869bd1ac1af5674c6dca2f724a0613e9c552e

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