Malicious PDF — malware analysis report

Static analysis result for SHA-256 35177392c9165fda…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 14:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c312fc7f84f969d1c926c181de3d160d SHA-1: bd8082a30e3dcddebd0c20bc85f27c1fca4ef18a SHA-256: 35177392c9165fda0f4451769a33c566110ca345320c916fa956b9a70bc1ef2c
236 Risk Score

Malware Insights

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

This PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands. It instructs the user to copy and paste content into a terminal, a common method for downloading and executing second-stage malware. The presence of numerous links to compromised WordPress sites and disposable hosting suggests a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://coretry.ru/uplcv?utm_term=company+logos+with+geometric+shapes
    • https://ludifrance.fr/userfiles/file/94983949980.pdf
    • https://angkortaxiservice.com/userfiles/file/38621333120.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/aot6dkt83js2shcj3lgeedin7q/91895616885.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30b9590df9---burepoziritamivulolowo.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efefa6d034---limisotuvix.pdf
    • http://inglewoodreunion.com/clients/68690/File/82668537790.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16079efce81c9c---talenelubig.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759d5fdf364---40997496280.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887d6f888e7---56689597755.pdf
    • http://cgl.lu/userfiles/files/66793210747.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2ce77c12065a25582d3cef179adb5097/zidinujesivigis.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d895fb2230---tuwetuwafovitepepasup.pdf
    • http://446888.top/userfiles/file/32877154157.pdf
    • https://cmsschoolkg.org/userfiles/file/vekapisikesiro.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f5826abb5---85901011152.pdf
    • http://bpabv.nl/uploadfiles/file/27478206442.pdf
    • http://alkanboya.com/files/file///nekumesepatedexasepiwug.pdf
    • http://watthaistuttgart.de/userfiles/file/14651279259.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb88.bin
fd846875c02dcf8a699af1eab143cab83e1c7cbfa58be33247252004d5904f3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 17816 bytes
font_01_sfnt_off00011a4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4D 16792 bytes
font_02_sfnt_off00013264.bin
dbc7a7227e8d83cf4ff6590a2e867680f6c99f6260020b1421c2bea7eb005819
pdf-font-stream PDF embedded font (sfnt) at offset 0x13264 11052 bytes