Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c9174dbb5bed6d…

MALICIOUS

PDF

94.8 KB Created: 2021-09-17 09:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43d0be9afac2ca3cd0791e478d458985 SHA-1: e36c1919643c1b7bdc0dbb08a2019e3de2820197 SHA-256: 69c9174dbb5bed6d4e5ab010e76df65d6821b1620e7fc1e55337b12fc500a8fc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are identified as link farms hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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://ateliergermain.club/sites/default/files/file/32253215851.pdf In PDF document text
    • http://www.examnotice.in/uploads/files/tuxufililexuloxuve.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/vimalu.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/67543810666.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/34099422912.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/36309831802.pdfIn PDF document text
    • http://web5gstore.com/Files/files/bejalu.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1fe1a9ff6---73852045738.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/93bc4d51a2dbd6283a7e8fa7df3893d1/11106748183.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/nomesabodunopamur.pdfIn PDF document text
    • https://chinatupai.com/web/js/ckfinder/userfiles/files/79131563799.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/vevudewuribukunukite.pdfIn PDF document text
    • https://kratky.eu/files/file/leriluxobowuwomozopawe.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/rerozixotu.pdfIn PDF document text
    • http://hkalc.com/userfiles/91375791413.pdfIn PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/87427744797.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/zixopuzuvifutuvug.pdfIn PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/xovoliginufimemal.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb35b48fdb---59014532616.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/93677466294.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436d0bb4714---sixisuzuluruziwidaruwi.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/89939302950.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/nuxodesitebija.pdfIn PDF document text
    • https://sinarwaja.com/account/files/nenijimuwaruwudizufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=putlocker+123+new+websitePDF 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_off00010a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A81 19064 bytes
SHA-256: 7d539555423583076d262c01a159ff73f8edbde8a63cac3a586a5db40b9ab561
font_01_sfnt_off00013c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C68 10824 bytes
SHA-256: ab13cb3afa777c5d969f1c8f16a86d9e30e004d8ccea08fadb9d338ff9f4b63f
font_02_sfnt_off000155c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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