Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd0f199905a93d8b…

MALICIOUS

PDF

83.8 KB Created: 2021-09-19 00:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c3f9b17bca1365fa129cee90af1c1671 SHA-1: a7ac506f406001871d891a24881c232d2d584783 SHA-256: bd0f199905a93d8be21944026423001f12759682a76efc619786cd21b81b1f6f
196 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and malware distribution lure. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's intent to trick users into installing malicious software by posing as a necessary update or extension. Numerous URLs are present, many pointing to potentially compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://archism.ru/uplcv?utm_term=black+theme+for+chrome+android PDF link annotation
    • https://38e5bbdfe8be.gdziezjesc.info/userfiles/file/gabokegafisebuwow.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/48363993987.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/nowegifibanuno.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9f8942e7c---vawidadifimilexoparixupev.pdfIn PDF document text
    • http://cutskytools.com/d/files/ruzolaxizakalufuxikutarop.pdfIn PDF document text
    • http://17njl.com/userfiles/files/50944248481.pdfIn PDF document text
    • http://krallarintavugu.com/upload/file/xoberapegarugulidek.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16140500b26462---87612999245.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a8b166938---gojapuwarapowovakoter.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210909022703.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/musisofitasa.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/xeporum.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/dafavowasobise.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/xoxemesexodejusowewasozeg.pdfIn PDF document text
    • http://orenprom.com/img/account/file/zovuxuvudobifuxozuj.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/sutakevipofaji.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/bimefegezorur.pdfIn PDF document text
    • http://bostoncake888.com/UserFiles/files/dexupifiwokobewuxiketunav.pdfIn PDF document text
    • http://kingtonkatsu.com/uploads/files/80012124165.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/g6radn6q6tmbvphidau74b20u2/20892528341.pdfIn PDF document text
    • http://imbirimbir.ru/files/zijalabowomuwe.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_off0000dfa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA9 19096 bytes
SHA-256: d2410bbec2b5a71cdddfcf0cfbbae9940476541a3d189eeb19284c6eea4b7c6f
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 10716 bytes
SHA-256: 145a35f0c0c811cc045863a3fb698f3c19d88d5aae1c5827f1de386e44b8403e
font_02_sfnt_off000129b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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