Malicious PDF — malware analysis report

Static analysis result for SHA-256 073200d0970d3a9c…

MALICIOUS

PDF

82.9 KB Created: 2021-06-25 12:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 31cd89a6c2b029580496b993b3e44196 SHA-1: 39433037c79751c496d411a6f92f6f989166c878 SHA-256: 073200d0970d3a9c43a4a049e0391f8bd9b6bcb90b9693d70bbc6823969e2f8d
276 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 User Execution: Malicious File T1566.001 Phishing: Spearphishing Attachment

The PDF contains heuristics indicating it is a malicious phishing document designed to lure users into executing commands. Specifically, it uses social engineering tactics like 'ClickFix' to trick users into running commands such as 'cmd as administrator windows 10', which is a strong indicator of an attempt to bypass security measures and download a secondary payload. The document body is heavily obfuscated, but the heuristics strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 9

  • 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609416a376e40---9633962499.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f066459cc7---4726650215.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca324ca814---84455596489.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4ce03ca6dc---wovakipusovufizigamuret.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/e463fa595f4ba4c0ec8535241953a9fe/11362095324.pdf
    • http://cl-metalparts.com/d/files/10815689660.pdf
    • https://arvikabc.com/images/uploadedimages/file/fuwidofe.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/gadufoxokide.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cce43010263---2450185739.pdf
    • https://oncallanatomist.org/ckfinder/userfiles/files/83574861062.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4a5af397e56eb86d682651b5270471cb/71894257019.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a94dd3a46f---28127011434.pdf
    • http://www.bufolari.com/public/immagini/file/48807243195.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=cannot+open+cmd+as+administrator+windows+10
    • 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_off0000e0a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A4 16792 bytes
font_01_sfnt_off0000f8bb.bin
8ec474f922f1d589d3d35e15a1c091c773b1116f8deb831045c460fe76a42bde
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10920 bytes
font_02_sfnt_off0001121f.bin
4e45a50146efeb832c8961e99d2d64f58526a8eeff73b80dee602134e08d8e3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1121F 17016 bytes