Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab291618079f9ab…

MALICIOUS

PDF

93.0 KB Created: 2021-08-07 00:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4f57ffc17edda2723dd8e6ceffca433b SHA-1: f832cea81048087721f4917cdf012b0aee97ef7b SHA-256: 8ab291618079f9aba2e4f81c463280ee8f69f4ed85449a8a9f9fe03fb581072f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. The embedded URLs, such as http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffabe684a0a---votuxadozodoja.pdf, are likely used for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/34d887f4143fd6f0b2f8223e8a2a6c0b/kivun.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/e35ea6f970ed126d7de965e75aece436/vejotawimepujufim.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffabe684a0a---votuxadozodoja.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/4088c16ab2b86a9943ade95f6471f21c/51745246042.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/novufapopugofuwawenar.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/56189492775.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/levinunorofotafuluxikelot.pdfIn PDF document text
    • http://geodez.com/pliki/file/92426611025.pdfIn PDF document text
    • https://soportedevida.mx/ckfinder/userfiles/files/77898289918.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/90fnm2roob2e9r3hjvlaf93ep7/lusemakeba.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160be422a0e853---14124418622.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e632e2115a---xolutabemulukono.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/66768131601.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ru2jiftq436nq213iule5aurac/45218086498.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca43ac661e7---57662607076.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160987f71a12e8---vanidexo.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/43342225767.pdfIn PDF document text
    • http://malifer.hu/upload/file/7871952597.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///72647500019.pdfIn PDF document text
    • https://sfeerweter.nl/userfiles/files/87246883875.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/33654899159.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d15796336---69384891398.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608356c5e0817---wuvok.pdfIn PDF document text
    • https://susta.vn/userfiles/file/50208893226.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=john+wick+chapter+1+full+movie+free+download+filmyzillaPDF 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_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 11280 bytes
SHA-256: c186e2bd280d09e6fee9345b40fc05b331acfd13ec56d8c6fd751c39e94f61b1
font_01_sfnt_off00011ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000134b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B3 17876 bytes
SHA-256: cc519371f06ed828ef1141623d1275195571acc3fd95ffa0181b18176a061e48

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