Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefcb0764c32c695…

MALICIOUS

PDF

83.8 KB Created: 2021-07-01 17:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 226cb8ebfdad2ff4b516cbf0e58733f5 SHA-1: 82cec47959ba546934f3b7d7f5037af6973057a7 SHA-256: eefcb0764c32c695d25addb9625985a7891c862eb02ff76d1ff96057571de162
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm directing users to multiple URLs, many of which are hosted on compromised WordPress sites. This suggests an attempt to lure users to potentially malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/agq42m3hrblfpssrpbl96cq1i4/pozexuladegebasa.pdf In PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/bisejigobejegokugexilux.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083a62e3a553---288098970.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/32585610664.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/1522127475.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/18751170384.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6985354f14---zupepufisawoz.pdfIn PDF document text
    • https://argumentua.com/i/file/97931015579.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec07f107c5---xizir.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/fadovewemisisiga.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/63b81a4594f2cac7f7b0148c503dc297/91590006962.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/gstuotouqt81q5l4ne7hu8va32/vusuponuradulujut.pdfIn PDF document text
    • http://mextro.de/upload/files/jipizi.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/5803afef1491128f7146fb02ab481cd1/zomufobudafon.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/6588f09fff6c763ffd71a824d6e271e8/88312420322.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/nisipepijixabilagipivewez.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/e9f0d6e7ee8477254440746c005ecd5b/kudifovubitexazasufi.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/bofolex.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/837336d277685a4eb8815117e24d17a3/jefalonelonu.pdfIn PDF document text
    • http://pho32shabu.com/uploads/files/49600607788.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/50123129916.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/40a837de857bb2e55cd539200a610b8f/96746539242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+fast+do+you+get+pregnantPDF 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_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 16844 bytes
SHA-256: 9a2ce9d365dc92a0bd2c6334d4a2c7016ad87976c57bb54b346cd20592cdc87b
font_01_sfnt_off000110a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B8 10824 bytes
SHA-256: 5e15571f46176e80725a41d0b2e3459d0796c22132443613890d048058bbf33f

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