Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e26c4e2e2078dcd…

MALICIOUS

PDF

84.0 KB Created: 2021-09-06 09:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 004dbfd141d9ad23d405ced55205c353 SHA-1: d672098afe182ca2d112810bc20bdb815a37861f SHA-256: 0e26c4e2e2078dcdfed695161252c60424767a855f07710b450353a274ebe02b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://rts-3.ru/upload/files/80815520686.pdf In PDF document text
    • http://sintjorisparochie.nl/userfiles/file/76155258703.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/f7ti4gp4fivos7r0fkgotfor09/disebepatojebiniru.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/32d14934f0fe8a1709a2d19bcfe35f49/48043876204.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/kipiwasediva.pdfIn PDF document text
    • http://alltechsro.cz/files/46617057864.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/68072073707.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/tadesebe.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/68qb9r086n2qm9bro2bu6b070h/vofesubuxetudemivu.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96d2636352b1c20c5f1b0f6fc0141e6d/riwadamojuzokedi.pdfIn PDF document text
    • http://dreamcatcherltd.com/userfiles/file/68930680301.pdfIn PDF document text
    • https://petikdaun.com/contents/files/sekovupogofezaxidikekoka.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089d45a37450---wekiz.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161115c24182b7---xopofutijagazuseb.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2b3f85d9e---52568858185.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/97669735921.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a635cc68ab---xemefivisazukijejeji.pdfIn PDF document text
    • https://network-italia.it/file/2781163987.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5lc4v6hgokmjn24dbb67h8aj6r/30349864044.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/pazemunokokolixo.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/61362110171.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/78835021119.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/34655691536.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/nojosabadegasedupovad.pdfIn PDF document text
    • http://alvitraders.com/files/19173565627.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/dc4s34ii2vn68gbs6uthku4ce7/nodibojukowudote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=gotoh+510t+manualPDF 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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 10328 bytes
SHA-256: 7a9b4c337bd6aeae48e3d09b6e1a5e36cb499ce5a1a89ea6877e83da162c8d55
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 19712 bytes
SHA-256: 80db4f1d86c5491b58e25b7eacbdaf25e85c95436b5dca764cfb9eb1033d26bb
font_02_sfnt_off00012a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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