Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3c40e30210e69a…

MALICIOUS

PDF

81.8 KB Created: 2021-09-02 17:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 88e954083aed74f0153781d16506d5fb SHA-1: 185a55c7d591c3eb4720f979fa6f0bdbbd4fe0b9 SHA-256: ec3c40e30210e69a1a8d6c745d61cb9306e2fd0131232ba7bbe19f2ac9439e49
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links, many of which point to compromised WordPress upload directories. One high-severity heuristic indicates a PDF link to an algorithmically-generated URL, suggesting a malicious intent to redirect the user to a secondary payload. ClamAV detection confirms this file is malicious, likely a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d222fe123c---90400638246.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c483023d87---3944165535.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/jetifon.pdfIn PDF document text
    • http://polloricowings.com/uploads/files/xefuzeramefup.pdfIn PDF document text
    • https://tauthuy.vn/upload/files/xikibufirivo.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/57948984430.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e3aef641a8fcb63d6e1ad001f9b40e63/kemuwefedalekoposikafoba.pdfIn PDF document text
    • http://www.domplit2006.ru/ckfinder/userfiles/files/67849997486.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/30361676342.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/gasirejipiwades.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/08e74839e2234c40cd4073094213b4ba/30987383753.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/53600456953.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/tuxofagokigotivezinakeril.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/fosenubitabimow.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/figifuvitobi.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/wazoruvovorixesadinunenod.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/85405304205.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c6d67a145a64f09f6f73d2a0d14d166b/gibikigijorifugaj.pdfIn PDF document text
    • http://pettwayfamilyreunion.com/clients/39389/File/nowojixe.pdfIn PDF document text
    • https://cantellodetersiviprofessionali.it/uploads/file/rukazonatitagesizogedex.pdfIn PDF document text
    • https://altaspin.com/calisma2/files/uploads/92482185576.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/6105113500.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/87455331356.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/70415114454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=walden+civil+disobedience+pdfPDF 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_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 17084 bytes
SHA-256: 30255ecf168cbcfcd980597fa4d71213c6140d3001d8c53ad8b6d3183a294250
font_01_sfnt_off0001095f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12176 10616 bytes
SHA-256: cff6791cfa12e38e4c9ff2c985f62be50929fc8b7ebe4578723323364726fd01

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