Malicious PDF — malware analysis report

Static analysis result for SHA-256 214c48b7bb307c76…

MALICIOUS

PDF

93.6 KB Created: 2021-06-29 14:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 82438c99104141e63c3e4e10459f3ba2 SHA-1: e9e795b61da2907a1c675d98a1d68399b1c5c0a8 SHA-256: 214c48b7bb307c769db7ba29cdb0ca293ca7e654373e6db3cdb25a2b01080a6b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories, suggesting an attempt to lure users to malicious content or downloads. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/64jrhi9bltl7d74orrc03o1km1/98803414725.pdf In PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/87203958378.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a234dcc9cca---11839902605.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/5c3d287393bbe3f6ac50ccfbf557a935/91662880020.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/05677f6e0cd2fc306e78302a7317fc10/6935032785.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a795010d32d---xaduxofozurole.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/1d862379db5d78f803701de05154a648/85053688795.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5a8055d94fcb398caf9087e7d5062a4/lirumiruxidugi.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/zanizenulimi.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/4716047836.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/gokil.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/8c31b45e05708c1d4e803dab62dfb5b8/wibewukova.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c41aaededf12e1d43d0fb12799fec718/finuxozinagepivora.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/19898973383.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/semufe.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210618110821_64tjn5.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c4529208fc49ee622ba599fd813e3f87/8729805492.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ff19b5a1f---19525990488.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/37448160514.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/5khus7cj29c1ntrtr4avcer5j6/rawatozebizufegatiso.pdfIn PDF document text
    • http://altinay-law.com/images/file/jaxajebasonekuguzuviraduz.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0121cb6931---63460397976.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/ragifid.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca51bd02c---dulejixojevawisamawogu.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/5098682003.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a466b6a03cd---gebibadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=free+fire+new+beginning+downloadPDF 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_off000109eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12202 10464 bytes
SHA-256: 10b997b47b8e82804b6cd30bc5aad3c74222cc15d21a83b38007ae5194ed1876
font_02_sfnt_off000139a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139A2 17836 bytes
SHA-256: 07175fd0e6feeb63acafddfbff5044ba62c5d1a2005c8094dbf4019f0e2bafa7