Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec12364c0f7d5dd…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 21:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2a39045425f0074555c223127d267de1 SHA-1: be6e32800bed4b11bd3ab2b5430a5a94aa9588c0 SHA-256: 1ec12364c0f7d5dd13246019da876f1d903aa0125147d5ba05484d8f7d8c713d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://szguilong.com/userfiles/files/95649535518.pdf In PDF document text
    • http://top-conversion.ru/ckfinder/userfiles/files/wozogu.pdfIn PDF document text
    • http://citysuji.com/ckfinder/userfiles/files/noxukubo.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b0c462e767---xisarilarojonugelawabege.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/83926210719.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16081b07b3f8b2---returugire.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160792a17eb6e2---bobuzaba.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/46924899878.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076068a279d8---nojokawu.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0bc26349---62089381479.pdfIn PDF document text
    • http://bjsprt.com/uploadfile/file///2021070801500697.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/161032254acd92---natumajaxigevuxemoborevif.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49e69adaa---82453377866.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/mv03kjrotv58orjmvjm0rfuta3/norevobusezez.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/xoveloverirarusakow.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/0a9d2d44007792e6ee99c657ccdccab5/12238468020.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8442b6eaa06263333347bfb39d3cf6b7/lazasakines.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/17625726293.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/pedezef.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nvc5gph93ruhnmralc3p38176g/35113975572.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/fegizulidonoju.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/b2ac42d241e5f0594c6e8f73a254d980/47061311357.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d83a5e90f9---32564388768.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/jikexorivepegusimap.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/55239429208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=gaudete+piae+cantiones+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_off0000df04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF04 10604 bytes
SHA-256: 069c03a9f9c51669fdf3d279661f1d6bc5b83f1e7e2af532127284ddc443eb74
font_01_sfnt_off0000f764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 18840 bytes
SHA-256: f023f7a6732caf642fedd39346c6a8159d726cca74f9455faef2b3478c58ffb3

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