Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97e54853aaa2d0f…

MALICIOUS

PDF

87.2 KB Created: 2021-08-21 16:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 38a4857106cf18cbfe4a005d438e9fb5 SHA-1: 6a700f7b00a14cdfed7a5d46476088841d0126b3 SHA-256: d97e54853aaa2d0fac8903799b2e01787f67875b778b39d8201ad185b409cb6b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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
  • 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://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d1b521f1110c6e5bde6925e7603f66e9/rituvelefemutofusedev.pdf In PDF document text
    • http://debeight.net/UserFiles/File/burozunisigoguxat.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/sezumawa.pdfIn PDF document text
    • http://www.heatandgas.com//EditorImages/file/tegimatopefe.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/bivanerofakotakelugepog.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/mafinenidozenapov.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/18803960670.pdfIn PDF document text
    • http://gerocuki.hu/user/file/83458602843.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/af1gmle95dmk8n4hifouss0rs4/74014968607.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/e1211053e215d0f1e44e1f096628e2d5/sajotun.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160be0e2adf429---kedipavoxikexuganeja.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/gibatarofemijezizu.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/vikebikigunu.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/jonadedajedab.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/i55e70tioouvnhsr2ju43t2q19/pazuvixemifitexugefemuf.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/f6c9b67cc8017a4932e49677787db498/rawezigiriwidatobidaboj.pdfIn PDF document text
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/mezimuponokozunamigudano.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/99629847799.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf2842a4fe---liwiromazekitugatapinug.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/l4rmlrhsqs2fvikg1c6g0bq28n/7858357345.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/75828096668.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db7178844a---jawenupetikasa.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/81017808183.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16097cc426999f---zuwesinexusazoku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=xforce+keygen+2020+mac+catalinaPDF link annotation
    • 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_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 10964 bytes
SHA-256: 111cf882b2df59586c2c2c89ebf95c23fbe4d2fb5892bd47dd76055b16afd516
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C8C 18896 bytes
SHA-256: 025a3da41bb60ba8c549c2ec4d1f03f3e48602f905f301eed9176dd2ebee2426

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