Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d48cb3ba020625a…

MALICIOUS

PDF

98.5 KB Created: 2021-07-25 07:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d47b17b69d77e7d471025d8c3f89e0ee SHA-1: fde684f66cf93bcf0f8fffdb084f89c17274cc00 SHA-256: 0d48cb3ba020625a28630179a40f0179b2dfc6f3eec17b8b2b4f6fc555b13c3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm used to redirect users to malicious sites. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://commonwealthsportsawards.com/userfiles/file/9175460365.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66772207f9---68914401458.pdf
    • https://trimix.bg/UserFiles/File/24696702121.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/ff6c62bffaedf5d83ff5be98c10e0e0d/papumutuweneneximevojede.pdf
    • http://kiuanai.com/userfiles/file/65837946895.pdf
    • http://afslab.asia/upload/files/68798998848.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b207c2e0ceb---bawusoxivakiv.pdf
    • https://mobilieroccasion.fr/uploads/file/lelupukukoke.pdf
    • http://jnejendomsdrift.dk/userfiles/file/35849346405.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/n0goa6tk8l34u3ehpfa3iatuma/bejemogamujub.pdf
    • http://nail-free.com/ckfinder/userfiles/files/fifakunegofip.pdf
    • http://cnc-soustruzeni.cz/files/file/73424079890.pdf
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/rt9rav6rm573tj5ruo0ttcjct7/85001600174.pdf
    • http://duszek-lasu.pl/userfiles/file/kexal.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac91c865e7---83169125807.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c176442bd3e---ragovevupulugunirizem.pdf
    • http://greenplanetnepal.com/userfiles/file/pudujavutapur.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/usap24bcn4822ub5alvld3b5o1/vulajolerobaran.pdf
    • http://nemdanangpho.com/uploads/2021-05-27/images/files/28310327423.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc6718cdbc7---90267335759.pdf
    • http://nutricion-intravenosa.com/wp-content/plugins/super-forms/uploads/php/files/df0f3b13e9cdd4e0f50c4bfe60603cc9/lolipoxanasejo.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6e66d5c00---towezu.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33dc494736---67056885340.pdf
    • http://csaladiegyteruautok.hu/userfiles/files/22750978825.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b400f975244---piguxuxegebir.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+turn+off+keyboard+backlight+macbook+air+m1
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119db.bin
ddd8b2a05d451d93b9183ec50e6822dfcf8c275a819dbf2f4b97f43f5201912f
pdf-font-stream PDF embedded font (sfnt) at offset 0x119DB 11328 bytes
font_01_sfnt_off00013428.bin
f14f0ecc3b302322b977c809100ec0c3edd1e6617f7d72afb464fcfa85de889d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13428 17968 bytes
font_02_sfnt_off000163ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x163CE 16792 bytes