Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5e2d564b47d1e3…

MALICIOUS

PDF

83.4 KB Created: 2021-07-21 00:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f1fcd427fa3aed41aa9018412f18047b SHA-1: 168928c28e44c0d94af7604becd20875e3b70f7a SHA-256: bb5e2d564b47d1e3c6a15f9642815d2a0c9ca5a2013a15a164f0adc141f62411
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The document body is unreadable binary data, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://weorderfood.com/uploads/files/juraxomowejebokeni.pdf In PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e83a96f6c3accbf62b0a612c027427e1/muxuja.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/47084483223.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab878c907a3---26005197182.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/87qfha1f58oq1kk5gike56724q/56626958785.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/2405209179.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/36f609ee53fe45f0f522c8d281a906f5/93629353508.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a971018ed32---42002036659.pdfIn PDF document text
    • http://vinmexindia.com/uploads/kakokifajivow.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f6194b5fc526031c1480c9748cb2832d/425185217.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/cmlj606e6debehnlvvttav0rhg/dizewu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/81735079695.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082460d32dd6---19968255879.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2e57ced37---supajekogivefominerudud.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/60uofg22oheq5j7lo7pjlhqh2p/34085699689.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/bcm3icg6e1el49hc31d5gv6vlj/tubewawun.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/35160638122.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/didogavekure.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa93034e756---mulatasonimik.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d6e88f612---saforapufosu.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ng37k9tq0bdooif2ssnmf6nhmn/lidiw.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/7485e718319114accbfb92173613fe11/37511360405.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/dekoralagepudipit.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/fd1cb1dec29d10eba9a3b7bff32eebe3/xilozudinibad.pdfIn PDF document text
    • http://abnicum.com/files/file/34791416470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+svg+grinch+facePDF 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_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 16060 bytes
SHA-256: b30348ea96f33ec2904b55472e9dcc3022099e2f1c464b51bb745a2145710e28
font_01_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 10396 bytes
SHA-256: 0c5d9ca58eee9122baccad87e6c3b160ad0a51ddca06e0d2f56ee0dac8d5ac2b
font_02_sfnt_off00012851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1