Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7cf0e28c62cafa…

MALICIOUS

PDF

80.8 KB Created: 2021-08-19 19:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27095ce7eb11ccb77dd3bd9056e44881 SHA-1: bb46b202ca100b45edbef8ce21b54cc35822ddf5 SHA-256: fc7cf0e28c62cafa54e589be3e581ec8e24194aa7a6f7ce8c4f77e2ccf760caa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb82295ca7---9323716811.pdf
    • http://robertoantoniz.com/resources/original/file/mekimazavigigamoziwawitub.pdf
    • http://studiotecnicoarduini.eu/userfiles/files/9625594318.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c591e03b558---16695852651.pdf
    • http://asokmontridental.com/userfiles/file/81231332877.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611fa10a61---15386223625.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/34787cd58b2194604fa7c0c0e093f9ff/29016803551.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf213572c---40679288854.pdf
    • http://wfuchiomega.com/clients/4/46/46a815049f9cfb11ab63b386d19cdfb8/File/zadewitobanebevuzu.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b3f757fc---lawelovekelorinovopufo.pdf
    • http://commune-bourre.com/userfiles/file/78217249974.pdf
    • http://parvazyab.net/basefile/api203/files/gorojuzifalugopowugix.pdf
    • https://argentinaproduct.com/ckfinder/userfiles/files/46431199376.pdf
    • https://rowadalbyt.com/userfiles/files/98276714207.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/d3cdpkcmrravm4b2q4fffhkosj/15943398750.pdf
    • http://crmrealty360degree.in/ci/userfiles/files/galubadunig.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118b87223510---16466383424.pdf
    • http://arcomproltd.com/userfiles/file/fefugoribenesosu.pdf
    • https://pypconsultores.mx/userfiles/file/60637818117.pdf
    • http://info56.ru/userfiles/file/wexuwabixako.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc31c23d1a---dibedapiwilenijuw.pdf
    • https://sardavetri.it/userfiles/file/19824407492.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/60474684590.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=medidas+m%C3%ADnimas+de+una+casa+habitaci%C3%B3n+en+m%C3%A9xico
    • 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_off0000d6ee.bin
f0dac2cd6d3558e2e2c15774300f13d022db37d35990c20c52f1d328741c76b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EE 11180 bytes
font_01_sfnt_off0000f04c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 16792 bytes
font_02_sfnt_off0001085e.bin
54e357dc349ab754afde8b60cf0f79efb2d7570b8800e9f94548c0ab0e5cbb85
pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 17088 bytes