Malicious PDF — malware analysis report

Static analysis result for SHA-256 380f06d2c604c231…

MALICIOUS

PDF

79.4 KB Created: 2021-10-07 14:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ce0c5f7deeb75dcb568bad65ea6dfa91 SHA-1: 4ae0ba22d2bdd4cdad6eb31446cbf08c6fa204e0 SHA-256: 380f06d2c604c2318ae3adf60280ac32e852a3c389e33f9529c4a6afbd14e73f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a large number of external links, many pointing to compromised or disposable domains, suggesting a link farm designed to lead users to phishing sites or malware downloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://purofirstli.com/userfiles/files/42008327378.pdf In PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/68767584228.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/27302486526.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/30644193073.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/92115390065.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614016eae0ae4---4360037511.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/11844577317.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/muref.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/37861726632.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/zaxufanojoluxiladerako.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/7898505682.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/31049889483.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a91b04cc08---32080305425.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/12936350775.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/toputeteso.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/pifapukizanogirunemum.pdfIn PDF document text
    • https://codecs.ro/images/file/takikulitoga.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/woderugo.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/wofomokipukupote.pdfIn PDF document text
    • http://hqshop24.com/userfiles/file/sofivativugiwikuw.pdfIn PDF document text
    • http://calisnt.com/uploads/files/jojoledawog.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/61943484771.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16146fd490250d---gupadovobono.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210907173438.pdfIn PDF document text
    • http://slmj8.com/data/userfiles/files/62653186833.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/6a031025cd0b442d2be756276642fc6b/riwulemoleda.pdfIn PDF document text
    • https://etimes.mn/uploads/files/sosas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+adventures+of+an+it+leader+2016+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_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 17864 bytes
SHA-256: a82055729743dd4fe0f630388217ea31d8f8dea39b66ad789db02b242659dad4
font_01_sfnt_off0000fd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD87 11188 bytes
SHA-256: 03c4e51f482853c2a84e9157a85716e511173185886d95d2a10a7615996e0769
font_02_sfnt_off000117b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1