Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee85508785e15d28…

MALICIOUS

PDF

110.9 KB Created: 2021-09-06 23:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 64ac1567085de932048fe16b2f7dff5f SHA-1: 177d49f9f60bb917fc45366cf3a49457820ff438 SHA-256: ee85508785e15d28c982c0b2f3335095c00a9e6a450fbd7f48db1a8960102a07
204 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan threat. The document contains numerous links, some hosted on compromised WordPress sites, suggesting it functions as a link farm. It also explicitly lures the user to install remote support tools, a common tactic for gaining initial access or delivering further malware. No scripts were extracted, but the presence of external links and the remote support lure strongly suggest a malicious intent to trick the user into downloading a payload or granting access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/uplcv?utm_term=bluetooth+controlled+robot+using+android+mobile+pdf PDF link annotation
    • http://aliceinformaticasrl.com/user/pages/tegevamo.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834ab963163---20117374819.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/melenuzewedamupilure.pdfIn PDF document text
    • http://fese.in/ienupdimages/images/files/pebanuzavesofutulanoxan.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/4747507977.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/e81320446528bad460b05e3caf422513/19038610248.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/9d3b5514fc67ca65b3d9ffc6dfcccc65/48921014035.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/26288525136.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sametegisovemo.pdfIn PDF document text
    • http://etoprosto.ru/ckfinder/userfiles/files/xejofudufuwurupatuxe.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/jagubujel.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/dukifulezelokuwu.pdfIn PDF document text
    • https://atlaskvartir.ua/data/uploads/files/34725172706.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/widovo.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/2081447431.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/bumunexepafolunipedoju.pdfIn PDF document text
    • http://riph.pl/userfiles/file/20962112475.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/29380303864.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/a5ef1a5b045d8e39774e23d93228f4dc/mufisupexa.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/wizizin.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/vuxadeduwuvukiginisimunex.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7363027e07---gifuvixuvelekupok.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_off00014a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000162ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AE 18788 bytes
SHA-256: e156d1c419dc43b2711a60a6655718372965dbed3067f7791c30112b428f7ec2
font_02_sfnt_off00019372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19372 11360 bytes
SHA-256: 49c7174c4ea0849e06862a985b2845814ebfa6c80184eac8c12eeafda372213d

Open this report in the interactive analyzer, or submit your own file for analysis.