Malicious PDF — malware analysis report

Static analysis result for SHA-256 750f2eddb0fd3154…

MALICIOUS

PDF

85.7 KB Created: 2021-07-07 16:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d2f80228d8d86cb2312227afbdce805d SHA-1: e74ef16cc37e215ffb90d47a9856ec068ed4bd6e SHA-256: 750f2eddb0fd3154e0c1f53e073a5d1c75fc7963ad4d584ae0d4f0aa6950191b
216 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs that point to compromised WordPress sites, likely serving as a lure for users to download malicious files. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document attempts to trick users into executing commands, suggesting a payload delivery mechanism. ClamAV detection further confirms the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://huntic.ru/uplcv?utm_term=windows+cannot+copy+files+required+for+installation PDF link annotation
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/f6777cb2db96ba9272bcf4a0aafc3668/fawejotumejudotepokoxinu.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/zekitukukotudevomaropila.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/fofitimanugidagazepotiro.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1bd28ddf---vepufivun.pdfIn PDF document text
    • https://avenue102.com/uploads/file/mipomaves.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d21d10f845613569a32b66cfec363f0a/timojemelagezomubixedefe.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7cc66210---xakotivugajujoxawu.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210606090753131.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tf8mef60s0vh3f9014iqprju10/33470192995.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/rpt34fj515ghq77ustmuaefml2/simizujoranifu.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/govowomorikamepaputalebu.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/vemafumifobodopiriwularij.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160706dac8d67c---gonomoweredelefujiri.pdfIn PDF document text
    • http://pgnsualumni.com/clients/872691/File/32254953995.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/mugawizevorewafelofulot.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/85920226790.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/029culo4kljgpt3dp428e4kpoe/62336770538.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210628_23A146A7EA36C722.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cbb3e1a05---xesidulabokugedar.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c482ce931f---wumejifoxujig.pdfPDF link annotation
    • http://bet-balance.com/userfiles/file/polebomadijovaw.pdfIn PDF document text
    • http://huiking.cn/uploads/file/160807294954.pdfIn PDF document text
    • https://susta.vn/userfiles/file/nejobulejeredimiriget.pdfIn PDF document text
    • http://firegallery.ru/img/upload/disogutidovij.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_off0000e8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F7 11052 bytes
SHA-256: 884e869eb32525bad4d4e3ab7791f89c45ec441d646902f3ea4643b6dd1cdc2d
font_01_sfnt_off000102b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B2 17028 bytes
SHA-256: 086f34d8e71bde488a4febfe043f0daf77756d747986acfa3c401b7a347e3b0e
font_02_sfnt_off00012f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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