Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee4c61ecf78d43c…

MALICIOUS

PDF

161.8 KB Created: 2021-06-19 00:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 6f7812027fbfc6ac90b8c2f6b58875f8 SHA-1: b14a1362b51bd723a8a8365649a56c55263ec7d7 SHA-256: 9ee4c61ecf78d43c0e5675b7ea7a096fddf6e52149cf7e4acc216e1e18f7e7f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/4d7333a805a98b99d3d72adb40803654/18167009939.pdf In PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/eb1c63bc08b1f30c776351bd98d0b36e/93430272402.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16094e927b6c35---fexuzewurote.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/02foo42ulhsqh9jbdeo1dqb80o/jolekedozosekenixaxoda.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/20045295945.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ea0a6b0ae---10577348005.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/8e110494900601d47d43c9063896fb44/24452640020.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085be1e6e64d---kejuwebisiv.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11477a1e33---50865457223.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16075ceead69f5---perexobazuzugazabilovum.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/p0j0ii39bf5s5jkh7griuiiqbs/ravufiwuxaxurolukeza.pdfIn PDF document text
    • http://ahchala.com/img/file/kigeloxatotodesupanosaxe.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160762606ed9cd---zatatilepuzevinexilu.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/madexuvidini.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd861392c79---51300028981.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/73134001124.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/lomejeta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wii+fit+u+isoPDF 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AC 6440 bytes
SHA-256: 705377623a4c4344e02470fedf876d1ed6f0c7c0eac322cafb15afc9430d14bf
font_01_sfnt_off00011370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11370 90148 bytes
SHA-256: f1f5e2621cb7108c9622779bd6aca64f1d4ce1eb6548e48e793196900dd0d9d9
font_02_sfnt_off00022351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22351 4436 bytes
SHA-256: 49a426dffa05d78f234e1280ad592d02b0cae7a79843ec757ddd183bb956be18
font_03_sfnt_off0002328f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2328F 14292 bytes
SHA-256: a1add7c7929435e23d4447a79e262678ac271a7bc2d9eb5d3ad916a71eaf748b
font_04_sfnt_off00026128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26128 16376 bytes
SHA-256: fcb5e032f09a7a445e3faa5eeec6cc23c9906cb21330cd73174056598b5feb74

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