Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebe598d268cf256…

MALICIOUS

PDF

68.2 KB Created: 2021-09-01 16:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8173a41585edbb87e3bce3621d40e32b SHA-1: 6b77b59bfa7f35f0fc64c1a74c58295d775965bd SHA-256: aebe598d268cf256102381db5b41b8ece00a79f661b42458c7c13901ceece357
176 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical of phishing campaigns, containing numerous external links. These links point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a coordinated effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=marionville+mo+directions PDF link annotation
    • https://binarbaidequipment.com/public_html/userfiles/file/venitanovoxiveroruka.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/likinawiforufadexusilinu.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/puwefivizomuza.pdfIn PDF document text
    • http://elitacasa.it/images/file/zolujulofisitim.pdfIn PDF document text
    • http://conganbacgiang.vn/app/webroot/uploads/files/bageluburunotatix.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/72198674019.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bff63564bbf---wuzurorov.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/82cfb6944daa7f423a3730baab52ebef/15368086316.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757a760938a---46984792574.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/wofupenutakisexo.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4dbc55514---wezonuro.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/86242270936.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bf6cd01c49---65162238342.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988ea5cfb3a---xenemelixun.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1608016afc0a5d---35356475386.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/40e240ca3f4ea01bd78a111e82f89f65/34698815783.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202106file/2021061922015570554.pdfIn PDF document text
    • http://emeat.ru/var/files/65780037095.pdfIn PDF document text
    • http://abbuffalowings.com/uploads/files/jevoselugome.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/o9csosj94n17bnubua2dbimt1b/tirurogoromudimikut.pdfIn PDF document text
    • http://fkhd.cz/data/img/wenaxilof.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/paneqmod576iqfagqatk34v65n/matonefoza.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/89571854850.pdfIn PDF document text
    • http://ggbris.com/slbdavbatala/userfiles/file/sonulusovimoliw.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_off0000b155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB155 13804 bytes
SHA-256: 60f3061cd21d4e7535517becea379bf25d2f3be77c50e0fcda9fe558d2c669fe
font_01_sfnt_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 10592 bytes
SHA-256: daad0f3e355c36e2bb7f5cba8560d52b02ec491528c775dbe54681d9e46e861a

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