Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29466c3ae02a881…

MALICIOUS

PDF

89.2 KB Created: 2021-09-19 08:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 773e3dc3869616380c232cc8704fe0e5 SHA-1: b5b5fd882b5b406ccd33e1423c7049c3d722bb6a SHA-256: b29466c3ae02a881542ec50a41e62409b1c35c5b06761609b87a3f734d2a200c
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple compromised CMS upload links further supports the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://drafthe.ru/uplcv?utm_term=pokemon+fire+red+master+ball+cheat+code+for+android PDF link annotation
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/kdg2gcd1fuh4jqe65umic0lc7k/lusemomavotexozajofonotu.pdfIn PDF document text
    • http://wedding-box100.com/uploads/files/202109131151335878.pdfIn PDF document text
    • http://cpils.com/userfiles/file/71899441732.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/11790351004.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/potoxuwavudolonatar.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/dajizegoradepatuzoxa.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/78260611370.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/xabewanonaxikopewoneku.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613598eb50e8f---15854993783.pdfIn PDF document text
    • http://jenistudio.com/upload/FCK/file/fuzakanuvewamad.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/c0e4ffr8kvs7d5adf0vrbjsp63/63386272285.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/43891821869.pdfIn PDF document text
    • https://www.ijmsir.com/ckfinder/userfiles/files/62002100900.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/20236918112.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/67877026753.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/wasajapofurelukesobupe.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/619907803.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/wulosobubijamorib.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/limibinovavosodumuwiregu.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/somukuwibi.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/85879302935.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140226f6f14a---janevisuxorivu.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/rebafazobumulivesalul.pdfIn PDF document text
    • 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_off0000f3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C9 10972 bytes
SHA-256: 7f18e841c994cd04e9b0deb1b4397b10602195bfb6d229b21b98c5dc6ff54345
font_01_sfnt_off00010d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0D 18408 bytes
SHA-256: d3b3962ceb5a1ac720c627169de0175068e749742e0dd437eca0eb5746dae088
font_02_sfnt_off00013ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1