Malicious PDF — malware analysis report

Static analysis result for SHA-256 97999572a5ed3031…

MALICIOUS

PDF

73.4 KB Created: 2021-06-14 19:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 717bdc0ed51c5d72ff568d6d251832c3 SHA-1: d3f6f5317868c58480a0bb2de7289e6f2792e248 SHA-256: 97999572a5ed3031eb356d1580081aaaa4252c0233cd61a20ccbad114a33adc0
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', and the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics confirms the intent to redirect users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8810

Heuristics 5

  • 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 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
  • 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://crewmak.ru/uplcv?utm_term=second+element+on+the+periodic+table PDF link annotation
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd06433873---bajoputixi.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f533cb8f98---99962230965.pdfIn PDF document text
    • http://meyanko.com/userfiles/file/%5C/bawogunovojagiv.pdfIn PDF document text
    • https://istanajp2.com/contents//files/91331308902.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/4ee5b16b4b2a97bf927d48ef90b28ca5/buvarisazi.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608267d4c4150---vusaxorolureja.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/73128830ee5366f828a3186de3964558/ninegotegidifusuwofafik.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/50863274753.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/62806373937.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b8941e705---xisezipowizajoz.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16079f7931936e---kaluwef.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/d855d2a85df3bd5bca799f70960f876f/lojupizipipek.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85c58f7e8---3036413237.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/zazomolugumuwonukarag.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803ef1e28b0---gidaminagor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 5376 bytes
SHA-256: 52c9e3465b35ac7525bfa27f7beac1d1dcced797c2f68d72e2750712f8a588d9
font_01_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 11004 bytes
SHA-256: a17c3cd0b908704be12c563a00fa0333c51e39584a583d6af860abbd362707cf

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