Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c321e5dbaf50d9…

MALICIOUS

PDF

80.9 KB Created: 2021-09-08 03:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 82d644d5f6948ea276070ecc835e62da SHA-1: 25c94bdebdc4350cafc2c4d1d29b029b5b705cc8 SHA-256: 13c321e5dbaf50d96df908c769fe2eabbb5292c3a37f46e2885d2f05642396f8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites or raw IP addresses, suggesting it's used to redirect users to malicious content or download further payloads. The presence of embedded JavaScript (PDF_JS) indicates potential for client-side exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://colakcivi.com/userfiles/file/46369366322.pdf In PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607df1e534577---rosujo.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a407e5823---3936907482.pdfPDF link annotation
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d4f490b9---40735263560.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/zefusedebej.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/3546544996.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/nobavumobe.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a9806a615d0---befapirowefodopofi.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/nekinunoluxoxukovejajupi.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/0403408782572d9eea2ae71f0053ef54/jamanopevigik.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e856e6c9bf---53773886050.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/witit.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/boduvix.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/vurewovenupotulu.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/82825744944.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612d63f96c0c9---45075294763.pdfIn PDF document text
    • http://suliaok.com/v15/Upload/file/20218252337388696.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/wimetataw.pdfIn PDF document text
    • http://vngo-cc.vn/cooker/public/files/pepanamag.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ba62b19c4f4---44494453413.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/siriponiraxugekegunajebep.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/22386637082.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/14975718341.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/28852304160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=oas+preliminary+question+paper+2016+pdfPDF 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_off0000d428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD428 11504 bytes
SHA-256: 27b4bedfa37b274932bcb15f0084ee0d1f803c7b8e5206b20b3c0149b95f6fb9
font_01_sfnt_off0000ef4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001075e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075E 17676 bytes
SHA-256: 6ecdfb8dce4f6850dfa9f76e0b8b742bfbb8c7071864526c963d4389c8c4c43f

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