Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e092383d727f4a…

MALICIOUS

PDF

81.8 KB Created: 2021-08-19 04:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43f5a5b228e047cdabf999220c70a43d SHA-1: fec30840ec32064e80305955654dea81c8510dac SHA-256: e0e092383d727f4a45ce614c25b7b078fdb88fa7aa6c054dfd97ab7a83426b34
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm used to distribute malware or conduct phishing attacks. The document body is heavily obfuscated and appears to be non-readable content, further suggesting a malicious purpose rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gulfcoolcontracting.com/uploads/userfiles/file/file/16478196066.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071d0ddcbd0b---nimobetuxigimubapibegibes.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/55b45c54eae0383847737c24ec5d04b4/80131348658.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/89690416245.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/kuvonuvugosufevufujigi.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/fikokude.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/jabemekovabigoretotezib.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-7/20210807030811523931.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/41092902950.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712f256459b---40638126400.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/pikipegawawifav.pdfIn PDF document text
    • http://ashioke.com/images/library/File/fubatoku.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/f5ls5qj7v7t07b9flmp24i3j1p/rebosaminizidejubekejod.pdfIn PDF document text
    • http://cosyromania.com/media/file/venejasuk.pdfIn PDF document text
    • https://queensflower.nl/clientfiles/69628508242.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/sowizev.pdfIn PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/9466612970.pdfIn PDF document text
    • https://cncunse.com/d/files/81565070304.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f40c62d994---sunaka.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/uc1n0ilkh27s25rjj0ifh4fa0t/dugigesosux.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/29534327223.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/40872189754.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/39190466522.pdfIn PDF document text
    • https://fallsplat.se/file/49130473704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+adjust+craftsman+trimmer+carburetorPDF 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_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 11036 bytes
SHA-256: e47a727a3348537e4932d89f739bfa50baabcb198b72237532a1caa5473498a8
font_02_sfnt_off00010e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 16108 bytes
SHA-256: 4976cd57c072e57039733e0355c702661634d973877961f8210c2f8d48f23cca