Malicious PDF — malware analysis report

Static analysis result for SHA-256 8008542ad6269796…

MALICIOUS

PDF

91.9 KB Created: 2021-09-13 04:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b54eadb67ac8fdd786c88435dfd60e56 SHA-1: 98f675cf07c68b74110518cc0228fc84b89d8ee7 SHA-256: 8008542ad6269796f0a1c19ae359b8f6f5a0f3f12b400d0339b374b25870c73d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://orosweb.hu/userfiles/file/jepogipabarezajupusilawin.pdf In PDF document text
    • http://mobiliteit.nu/files/fegekatuxemopaxumemiwi.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/19262424089.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b96f63b0a7---75900769334.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/64360315834.pdfIn PDF document text
    • https://www.pessin-location.fr/ckfinder/userfiles/files/kefilusolibaxasoxa.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/janokejagudam.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/21f528868d24b638ab7ee1b6a19305ea/jonopegazazivireve.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c04b72df99---sajibelud.pdfIn PDF document text
    • https://omegaplus.bg/uploads/pages/files/45030592150.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/kagaderug.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/49608092692.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/29181096999.pdfIn PDF document text
    • http://apple888.vn/luutru/files/31295278822.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/siwolosuk.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/56184683014.pdfIn PDF document text
    • http://novafish.it/userfiles/files/jaliximuxe.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/fovoxalasamafojakaguzexul.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/683ffe4dd036f8c545dd63dc5980f3c3/pilogoke.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ft5hl7ajrl1bjgqruebsmdb0h3/kejaz.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16130ce7a2bfbe---89680491385.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/zadexufoliguxugewuxobo.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/sugekexumidalexipitevo.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/purifekuxalonerudikiwut.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/zorasezizoma.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612edcbfde7ac---67908419873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=vatsyayana+kamasutra+sanskrit+pdfPDF 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_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 20384 bytes
SHA-256: 920545015374740434abb2b775acb9e872ded281b316925fa9a3e860fe6d0b83
font_02_sfnt_off0001497d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497D 10636 bytes
SHA-256: e10dbb1c9b7a64f89ab0e5cd2c9080a599047140ee3a4236c402b12ec0b2498f

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