Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ae74ea5e2f2861…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 23:23:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4ac318620abb88c5b0b6a4b20833016d SHA-1: 63c2a09d74e869929f80246ecbdf11ee3b9ddd71 SHA-256: 11ae74ea5e2f28618532a1ca21b7323ccfe7c8e670795223ecc304cb1c1ea0d3
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 heuristic 'SE_REMOTE_SUPPORT_LURE' strongly suggests the document's purpose is to trick the user into installing or connecting with a remote-support tool. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to compromised or disposable hosting, indicates a phishing or credential-harvesting attempt, potentially leading to the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://alrukn.co/userfiles/files/vanego.pdf In PDF document text
    • https://pfollowers.com/ci/userfiles/files/kitote.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbgocjqjtjvkoc7j2oo4oh5nan/25550171472.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e462b14d1d---tivabupudibipametu.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/76366424786.pdfIn PDF document text
    • http://anthonygillant.com/userfiles/file/saguzuwowiteni.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d7dd293d---keguzo.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/dobojonajifij.pdfIn PDF document text
    • https://ksuskalology.com/images/file/sanaxuravutosuvogew.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/wesegutuzuxezanokugudo.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/37383958830.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b041a2a9c0---5537518972.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/26252873507.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608336da6294b---bazoxefuwobovegopojixabog.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083e1981228f---nixabugorako.pdfIn PDF document text
    • http://lachina.cn/upload/file/zuzaxe.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/285f72fcc3dc6b1070c7e64f80d67f8f/tijukojewuvugaxini.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/podasipewarixebonu.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/tenatazivefakexakesofu.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/22124968266.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/muwekagafufanuxobeg.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f82c7a48b3---58646337998.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/d59b41d90b7629d30088d16f50d73a2a/tuvulob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=manual+lavarropas+autom%C3%A1tico+whirlpool+7+kg+wlcf70b+blancoPDF 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_off0000cfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B6 18824 bytes
SHA-256: b024791a6927f99427b87a1c42139ecb760216d962b8caff8ff4f63f8c860ae7
font_02_sfnt_off0001192d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192D 11624 bytes
SHA-256: dd0449a1948d61640ccb2941d5d02bef1d4fff66fdf6a7fa8047bc42799ba964

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