Malicious PDF — malware analysis report

Static analysis result for SHA-256 8225c7601ce53577…

MALICIOUS

PDF

75.5 KB Created: 2021-06-21 08:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b32eef500f271cc821a9faf468614d7 SHA-1: aa9de7cda7ac5290d087fa5d6336881ca808066c SHA-256: 8225c7601ce535775a0a9b16fd0ea51564178d6a5f2eebebbb8922a89b079b57
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's designed to redirect users to malicious content or downloads. The presence of multiple unknown URLs hosted on various domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cecb34574d---60297140826.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d4a51dae---46464580224.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ju78njhm87sp0lrl523k4e7fd4/82963916526.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/564fab908c485481a69d49efc945166a/talipijupadarorimafa.pdf
    • http://instandee.com/Images_upload/files/todagokuluduvaz.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d142e8f69---dogegirixusobilo.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966229ce1aa---40903418269.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1dd460be3---dujutedo.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c42b63722f---37958009842.pdf
    • https://go2germany.ru/files/file/nuxefuduzej.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608683398c6cc---davuze.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4c890929c91878149ee88cb11488cc84/jobajuto.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d128a09fd2---53111650650.pdf
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/94087980256.pdf
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4fc400cb3---34590063053.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c94f54a5b7c---39714257442.pdf
    • http://airconbank.com/upload/fckeditor/file/33825450491.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bholenath+photo+download+hd
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6b6.bin
2de031c8552e224dce1191371f639177adc6cc123417eaed9d51066bc80baae9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 4916 bytes
font_01_sfnt_off0000e77f.bin
b6cbaea6a360d1d55bd1d189df083e241c3120b01257c3961bbc4e5fa15d7b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 9948 bytes
font_02_sfnt_off0001099a.bin
fce4e7da0b1a387c83b2be81a8e0c9d7b8a252837cc4b32dde40abc57aa364eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 6084 bytes