Malicious PDF — malware analysis report

Static analysis result for SHA-256 956e4863670b775e…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 02:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 6b778481e18b787272eaf0056ad93b0d SHA-1: 26668ac7baadf1ff4de749e4df253b1c39fc5fec SHA-256: 956e4863670b775eb434d6f0b2088d752cb0cf04d1ac8836013c5e3252d7296e
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and contains no readable text, further indicating a malicious intent to conceal its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2650a8dce---daxusewug.pdf In PDF document text
    • https://hotelgaric.com/upload/datoteke/28249366569.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ee83e2e5f---57682804622.pdfIn PDF document text
    • http://arablift.net/userfiles/file/56444124620.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/7236d23752ee836dd68885535f9084b7/vuxutagitobo.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160718c7b047be---96892213707.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b12ac0d52---ginedudametina.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/fisutarokojavivox.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24bc54539---73637366142.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/35180491092.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082ba5f73c55---derajojupigoveri.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/xirapiwapudod.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/wenomaxuxunivudoreve.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf207e45ad6---jiwowoxu.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/8f1684634a828081140056bdee52923e/52541884908.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/ferefepalifo.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/6iitf0gu6u7hq4e3ii8850k4v2/51727411113.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16110b74cc2043---bakugoraz.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/15214039305.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/59869336326.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/fajekeremuwekinof.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098622f583cc---31667710836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=english+to+english+and+urdu+dictionary+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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC65 11096 bytes
SHA-256: 562d5776f6dc410a1c0fe27fe2856731211bd63202f324f2386cc92dd27387d1
font_01_sfnt_off0000f600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF600 18636 bytes
SHA-256: ce80eb0d79b140b9186779a3c40ccd0125f51594d8106b637bb80ea9f9996ccf
font_02_sfnt_off0001261e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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