Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd643516dea47e8…

MALICIOUS

PDF

97.6 KB Created: 2021-09-01 16:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ed503e6dc5c6608ce449a679c1cdfe08 SHA-1: f4b575175d14d735e8a222306d8b066c889344db SHA-256: 9fd643516dea47e8dea4b827af3b1f05cbad3535ac9722cab8a4052ab4daece3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm, with many URLs pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://fasaac.org/temp//files/31668033252.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b4c3c112a1---24336556443.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/zemavi.pdfIn PDF document text
    • http://vidiniaibreketai.lt/userfiles/file/puwikuvolemisotaga.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/bad0a6959b2db8b980d9b4c4392549fe/60664255036.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/14qruig1664q0qtl3gsi9p18no/wolofalixidurewu.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/sijisufosifibevov.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e133ecc3b979150e731c19a4dd8449e/69755189080.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a986d243fd---mageluzogokuremonexu.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/10022598890.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/zotakabobawobak.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a052010c37e---52972492897.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/50af4f38ffce9137ef8e5b205f4335d8/difusa.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/walirelirefap.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099bc8971c05---1687703942.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5b9a327597a486c9e0ba39078bce3ccf/gefulubapid.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1a4569406---nagulamifojenaw.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16074a8761a683---84968538023.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160798cb1e75ef---14427221640.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/81161230339.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/36389563008.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40d6ed9ce---raseli.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/pezaliwerebumebedod.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe62c7100f---zedufametusolutuxitupon.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/44459428667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=aptitude+test+with+solution+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_off00011816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11816 10500 bytes
SHA-256: 05885160b06e0f58f10465e76ed2389543fa57a970c250cb583f6767aaad8d97
font_01_sfnt_off00012ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001480c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1480C 18856 bytes
SHA-256: 3a8e65801faf65a3a5547fc1f73be1ebb8d75f25f210e7008b0362b3f1c149e5

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