Malicious PDF — malware analysis report

Static analysis result for SHA-256 0010080aaede4576…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 16:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 350a759ee99b082bb174db8422b385ae SHA-1: 4463a8ba531d76ab6b0bdf55bd2177a9bfa96a92 SHA-256: 0010080aaede4576d8f1ccd5bead77e0ea2bb65903948096c7e450e76f3e8d37
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various compromised websites and disposable hosting domains, likely to download a remote support tool. The presence of embedded URLs and the 'SE_REMOTE_SUPPORT_LURE' heuristic strongly suggest the document's purpose is to trick the user into installing or connecting with such a tool, which is a common tactic for gaining unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://allytemp.ru/uplcv?utm_term=warren+buffett+biography+the+snowball+pdf PDF link annotation
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/suzovirelemakik.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/48263733537.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4c265dcb1ecf075ffb6852d42abafd44/suwilegi.pdfIn PDF document text
    • http://geniuschulatutor.com/userfiles/files/zanenojoneboxiworaremibak.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vovotowivusegip.pdfIn PDF document text
    • http://talleresjpg.es/img/file/lodenoxiteninikomegovabo.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/67415326787.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e846ec97989---bilifidesupiluvubuji.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/92466365021.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/aua10s28fdrt3pikv5pf7dmd86/49387294588.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/zovaripatala.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/36001594096.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089887127290---4042612171.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b11658bf61c---zopimuzelipaxupesowiviv.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160877cec371ca---popuwokulalutasaxamuvor.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/826073984.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/48024870001.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/bovojufukowozaxadibizolu.pdfIn PDF document text
    • http://wujipacking.tw/upload/files/teziruxikoga.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/90942955359.pdfIn PDF document text
    • http://baracenter.be/userfiles/file/73298466940.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160911a4452792---nutojadegaxaxeginulaz.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/jenawerumimitigasipokimer.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/43523072745.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/90195525938.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_off0000e5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E5 19308 bytes
SHA-256: 3e42257a078e3ae7ff67f8d8d175a0e29e8cd8f6b2e4656b4d3d08773cebf8c5
font_01_sfnt_off000118b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B0 11208 bytes
SHA-256: 6c4c73d7b55ec1b5da36e912f9c27f8736ab33f075abd28b6d321f5402d783c8
font_02_sfnt_off0001327c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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