Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaab81ea8aeae0bb…

MALICIOUS

PDF

80.5 KB Created: 2021-09-20 09:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0009f5d34c8cd08d4bddb5788f7bcede SHA-1: 1b81979328119b692d4e60fe0c8f489f9f44f476 SHA-256: aaab81ea8aeae0bbd89abc27527c72baf9c451815ff9c68de9674154d6c445a5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, indicated by a link farm pointing to compromised WordPress sites. The embedded JavaScript stream and the presence of multiple URLs suggest an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting. The ClamAV detection and ML classifier strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614079b222e3d---jipixamemaked.pdf In PDF document text
    • https://dp-silver.com/userfiles/file/bagazalatozozuwojujileki.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/54202073730.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/d1f820916b20f6a96761224a83a02f14/98533054438.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/f48156cbc596c37c6a68e7f2ddbb5675/94727439077.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5c37bf97ec33db1c73ad8bd5d1ba7c3/20214335237.pdfIn PDF document text
    • http://mcrlclient.gilcom.ro/ckfinder/userfiles/files/gejuzuxowolabaxikekubub.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/defuwepulesipamuxoz.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109071216001787.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/89296828950.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/7627501544.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/fujafig.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/89474038155.pdfIn PDF document text
    • http://ux02.wadhost.com/js/ckfinder/userfiles/files/fiwapan.pdfIn PDF document text
    • http://espokebar.com/uploads/files/dafipologotuve.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/vowikazajuboxivuputedemo.pdfIn PDF document text
    • http://rowadhr.com/app/webroot/upload/files/wibomasutaralugatawomiru.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/kusuja.pdfIn PDF document text
    • http://urs-certification.com/gais/image/file/taleworuk.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/jagubexomonige.pdfIn PDF document text
    • http://telecycling.org/files/file/vajagajigakodi.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/3dc3202a25235c26afe63de2f7eef856/vipejonikukasixadedasid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cops+and+robbers+map+downloadPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/53421257402.pdfIn PDF document text
    • 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_off0000d68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68C 10620 bytes
SHA-256: 2eb9ed5a74fa58f4553dc7913e5c05a3d620308ca2bcb7717927a1bbf4ce4155
font_01_sfnt_off0000ee9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9F 18208 bytes
SHA-256: b3ce884be21bd51be793aa99daac1597e32837a743bd1f8c9515123429ed90f1
font_02_sfnt_off00011cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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