Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba725b4e2317b47…

MALICIOUS

PDF

79.8 KB Created: 2021-09-21 09:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f6aff42323ec0175765cf6013310b2d4 SHA-1: 74a2aa9660d251e3f21af797844e65f6debe1b74 SHA-256: 1ba725b4e2317b4766dff4ed518438232bb702aef748d3cc01acd71486b8f651
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a link farm pointing to multiple potentially compromised websites, suggesting it's designed to lure users into downloading further malware or visiting phishing sites. The presence of JavaScript points to an attempt to execute malicious code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://firmen-bekleidung.at/userfiles/file/19026395682.pdf In PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75874471609.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613593dc08ecb---meworuxawopotopomawane.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428a134a33d---62832544409.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/waleda.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16140771d15c7b---24626203957.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/53139292465.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/rajovuletep.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16149112397b76---29821450243.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/xugoligopabedep.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/bomilizuwezo.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210921_55BAE43B2AAE2BF5.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/96077386134.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109131904095167.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/xolafuxitaje.pdfIn PDF document text
    • https://tomaszbizon.tomaszbizon.pl/web/uploads/files/vemapibuja.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/turadarovegi.pdfIn PDF document text
    • http://uteambio.com/upload/files/38451319189.pdfIn PDF document text
    • http://ahchala.com/img/file/laworidusum.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/welapar.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/2924709928.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/zewomiwob.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/81498419534.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/files/zadadexomapip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=free+minecraft+apkPDF 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_off0000d5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 17192 bytes
SHA-256: aa7c994ba8362f1463e4f1b1185c82156d62a52b53a5afde40faf8cdc1587a2a
font_01_sfnt_off00010273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10273 10376 bytes
SHA-256: a9ad99e1fdd01244055e4e85f74d7b611a212060581bfe7661a33e92b48ad458
font_02_sfnt_off000119e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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