Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a8dff577af6434…

MALICIOUS

PDF

83.7 KB Created: 2021-08-15 16:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ec0e49c58968d6bd3bf4ec725b5e06b5 SHA-1: 2c8fd6340211b23b7f4724e49f9e59b5fa7d37a0 SHA-256: 01a8dff577af64348f2e3aed4df178c47a8d2072b0a3743ed64fe8b840178211
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. The presence of these links suggests an attempt at phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078009d929e8---funajitazexak.pdf In PDF document text
    • http://epoxidice.ro/mm/file/pixugugokijifu.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/digexalotakegewutuge.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e4973120f96---24602048885.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/salujafapixezuxijimulivon.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/tatedumafe.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/24207663545.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d3d29b4a447086dcd06fc4b22a3dac3a/76770074196.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80493d251---6293622674.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95f6bda39---tevitizud.pdfIn PDF document text
    • http://quincy.pl/ckfinder/userfiles/files/nikewexu.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d4162c15e---nitupifenejunit.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/75826379089.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8937fa480d---webufudinokasipola.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/riwopitajusovodukeloz.pdfIn PDF document text
    • http://voijin.com/userfiles/files/2202610017.pdfIn PDF document text
    • http://schokobrunnen.com/idata/xafazadiratujugofeji.pdfIn PDF document text
    • https://inncredel.com/uploads/83723428394.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/rixajusasowiruf.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd237be1d8---toxedanizog.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/90250514259.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd6dc05767---45971941163.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=harry+potter+half+blood+prince+book+vs+moviePDF 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_off0000e1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D8 16992 bytes
SHA-256: d16cfee427c4c79a7568f4e7874d69af2d35df47c9ca9bd6e063b1f76f4b7366
font_02_sfnt_off000125f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F0 11288 bytes
SHA-256: 6147f20bf5fc1bfbba79b64194c19ac5d3285f1c400a06b20c33db96375f3ab9

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