Malicious PDF — malware analysis report

Static analysis result for SHA-256 f601e78ee702b66a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 05:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6b3065854188cfcc33d5e2aa6e925c95 SHA-1: bd46847b9cd98fd342baefb5ebb1b056d717fac8 SHA-256: f601e78ee702b66abe2e11119514127ce6b275cb7e6b4546040cefbb1c5fd265
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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 http://limobebe.com/userfiles/files/bedadi.pdf In PDF document text
    • https://servicepapik.ro/files/53971010446.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c8f8ae88c5d15d917c651b22dbab01d2/22959257312.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/torizesojagunekurobox.pdfIn PDF document text
    • https://selltoob.in/ci/userfiles/files/xolixuwojewepopifavedami.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/zoladizowixorujasejipu.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/sozuvetolobazafuvarojefa.pdfIn PDF document text
    • http://osstemcardiotec.com/files/fckeditor/file/708816898612acceb46619.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b38f5660207---31677676024.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16205228912452.pdfIn PDF document text
    • http://web68s.com/upload/files/digukawegeje.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893d607a230---13231215157.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/37975917135.pdfIn PDF document text
    • http://dworbieland.pl/userfiles/file/93530145160.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/82408940441.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe8e0c52f0---bafiwuwigope.pdfIn PDF document text
    • http://lobi.md/userfiles/file/87046288864.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/281720188108.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c79a21831f0901772470e9ce507efddc/20733016085.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210614004450_sovgb3.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/37250293301.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/45713908181.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/86580291800.pdfIn PDF document text
    • http://mega.kz/media/upload/files/buzozojexufiwibanilagogox.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a832e74b9c3---96603542216.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa38b49243---66046761583.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=hollywood+online+betting+loginPDF 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_off0000e0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 17308 bytes
SHA-256: bdca2b78f84e980c67eacbb56c4d62e1e53a683f62fb6265dfd0438a5308bb75
font_01_sfnt_off00010dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DBC 10324 bytes
SHA-256: f89eec3d68fb41817121b7f9038a7b161907edb05acb13198c10ece8bcd5c37d
font_02_sfnt_off000124de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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