Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5acb2c47d97b5e…

MALICIOUS

PDF

71.6 KB Created: 2021-08-30 03:11:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f5b69f5bf4fe496a46dfbf9d82187761 SHA-1: 479255b9ceb550ba3f59f5c1ee2146ef139831c4 SHA-256: 2e5acb2c47d97b5e08d6c42c4b3cd9774ef5556a79463aff03ac595b009124a3
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms and disposable domains, indicating a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://poddertradingandindustries.com/userfiles/file/11482479966.pdf In PDF document text
    • http://tetraeng.it/userfiles/files/jimosamifobij.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c63fab68631---nozuzizivefus.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/nutulunepame.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/81945057265.pdfIn PDF document text
    • https://biocoils.com/img/file/22326080394.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/3e134945a5a661327e2e14c7417b5e63/sovidamit.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4763e897fe---fajojosakotatoli.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/8323025084.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/bd7jfai17inj4ebcsi9cs185re/32013905256.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa62b9e4a0e---21638069580.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e968245dcc8---fowonafakipim.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/63570767719.pdfIn PDF document text
    • https://computerzone.pk/file/wadalux.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080de0938a36---vunizu.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/fumobe.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/3d4523e55f25ca4f2ce22d8ca8598145/fubume.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/fd2ab92d5f1639d45993a68f0a7eb212/96014579996.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a445844c1a3---zujipimujiruvepo.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/nuxeraxofaxamuvezojoxigex.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/81528077470.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/31080083662.pdfIn PDF document text
    • http://texmet.pl/userimages/file/584427635.pdfIn PDF document text
    • http://rahway1968.com/clients/5/53/53e48f2724afc57738bbbcfbfdbdad27/File/21013995185.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=word+for+mockPDF 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_off0000b9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F7 16100 bytes
SHA-256: f40f254a4ef6a519fbc1023f8851c8b3fb32fd81ae802981433e2da861f98b8a
font_01_sfnt_off0000e304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE304 9920 bytes
SHA-256: cb990dcdfe2a2a11d2eca06cc27a15022e3930ec513f6f8c19b36cab24d4839a
font_02_sfnt_off0000f8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1