Malicious PDF — malware analysis report

Static analysis result for SHA-256 0222a84c0f8aada4…

MALICIOUS

PDF

100.0 KB Created: 2021-08-07 21:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 107ae800a7ce3263db28eedf5b251888 SHA-1: 7b3e333a6dccbbe35b807157d1548c777f16924f SHA-256: 0222a84c0f8aada4fb5a19c67e03b0ad08eefdaea7b0b51160b58595da8663b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

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 https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a11edd16a---63170397217.pdf In PDF document text
    • http://grgct.com/ckfinder/userfiles/files/27687215511.pdfIn PDF document text
    • http://hopkinshigh62.com/clients/7/77/7764523e397120ad9b09b1da26998858/File/rivebaso.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/bapikabikonisazu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4a9ed07e---17410945775.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b8803281c---60033571706.pdfIn PDF document text
    • http://garderoba.sk/images/_file/35120123577.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/jetbvounp4esja312cp6t5l6jv/xonobovozesovosakizakomal.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd1c269e88---28251975979.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/824b0eab1e0fbf87319dcf09834df588/64757045384.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/dufevanulozaridobejax.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/451db57591d6e625a73c91fe7f30ab9e/lojobodi.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/79312442555.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608009d8420c0---7515603124.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/senovaralotodekugowela.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609413680884c---52932230600.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/20099320342.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/eoi4lafbm6n825m255sk6rk44e/67432124123.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/gunefidozamobafano.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/2402605498.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8e5160c92---sezukudiwixudonulu.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/82151525995.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18ab8b5374---tuxed.pdfIn PDF document text
    • http://air-con.ru/upload/files/12056836258.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a61b6c4e5a---48061114426.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=finding+nemo+full+movie+download+in+isaiminiPDF 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_off00012474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C86 16660 bytes
SHA-256: 17518e841c0bd4d46bdc4a5e25c7c16e9e7deb48e4526117fc7cd7be90c8aaa7
font_02_sfnt_off000167f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167F2 10728 bytes
SHA-256: 9b89e9c44faf71d08b3f9e2be1bdc60ee75058253d5b23f959cfdb871f6bb4a8