Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29b649fa1eef340…

MALICIOUS

PDF

90.7 KB Created: 2021-07-06 23:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0bcebe54767744190122d267fc112a8 SHA-1: 90937b9935f2a8b3768d019f3207f9a7bf9dbb42 SHA-256: a29b649fa1eef3402c855cc5542f74b98bd2ab64c1c4a9b8b763c2abbed58308
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3336a9d26---vimividexepaviseg.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/b9293a2700daf5b7729a93a913b65e51/dusaliguvegog.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/8285006060b92c5ea23d3.pdf
    • https://resonanceacteurs.nl/userfiles/file/11240658781.pdf
    • https://hoongnau.com/upload/files/zepaxem.pdf
    • http://thaisomboonautopart.com/userfiles/files/sifonilidexafos.pdf
    • https://conexusinternational.com/ckfinder/userfiles/file/punotozagarikureniwuvug.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a20da7eb6a8b0bdc207515015a515e65/66361385637.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a8985b7cb---996955351.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080ebee31941---22767966496.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4a6b0bc11---25830595416.pdf
    • https://clubelsendero.com/img_pag/file/womesexafenowewuwusa.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/atcvrk20ei6gfilr67g97ifln2/14380887574.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f4092a7aa---dipaxafazenenubamow.pdf
    • https://aradmissions.com/ci/userfiles/files/44707486658.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/4dge0ujff22k7jt1odmpcfsfq1/dijoloboru.pdf
    • https://dalton-english.com/userfiles/file/68908710886.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa999ba330e---lofuvo.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/56d737fbf5d73374d4340770d770a3fd/deguw.pdf
    • http://studiorinaldibedin.eu/userfiles/files/16759881786.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/b80b30db850fade5b497fa86c354024b/46819706373.pdf
    • http://soflocops.org/clients/83264/File/ziluxidiwalupavodu.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089300457f69---3313177342.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=avengers+2+tamil+dubbed+movie+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd76.bin
0f881b341de84f9d96a9c22923401e26d935d0741f2e10c92dd21965eb00f566
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 17608 bytes
font_01_sfnt_off00012b91.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 16792 bytes
font_02_sfnt_off000143a8.bin
3e6a531b45eafd65642d57d55df856b3f64a5601e9c684b455762efdab02b90f
pdf-font-stream PDF embedded font (sfnt) at offset 0x143A8 11084 bytes