Malicious PDF — malware analysis report

Static analysis result for SHA-256 36fc9101f0ed991a…

MALICIOUS

PDF

101.6 KB Created: 2021-07-01 11:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 429bef4a308e0074b3da39cbe6cd6897 SHA-1: 6b578788ba8f49695b7ff13837454da01249f505 SHA-256: 36fc9101f0ed991a9a7f26056c569c5679ed3b8c888c9f5af1fbb15db98d57d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. While no scripts were explicitly extracted, the presence of numerous external links and the nature of the heuristics indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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 https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090d883b5865---54573267864.pdf In PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e83dc02f---larebaxovenafejobutira.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/21635629765.pdfIn PDF document text
    • http://axwelindia.com/uploads/zefesazem.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/8208809163.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/da9c1e35f8f0112b6b7b346055022720/metamezefog.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d58405fae07718964b17e47e32600af5/kajuram.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0cfda9ba3---83711872995.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202151613502340.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/nixasafo.pdfIn PDF document text
    • http://metapolar.hu/tmp/31829296300.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/k86rpubf5b6q4c63cac66nu2b1/wonofefago.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/dorevozizariwet.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/2923227748.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/14832107901.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733b4e40b5e---xijivaris.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/80643927458.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/kigodexemetebawagajimib.pdfIn PDF document text
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/94233767226.pdfIn PDF document text
    • http://spalovnachemolak.sk/userfiles/file/telomovozuriwupu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094e3acd9268---wukonavikuj.pdfIn PDF document text
    • http://michalbaryza.pl/ckfinder/userfiles/files/kixalij.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/2b7354ce579ab601ebb940ec90e32416/wunutobesuzabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=melting+point+and+boiling+point+trendsPDF 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_off000129b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000141c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C7 10700 bytes
SHA-256: 72bd65097ab35823713ae71da2266cac106b2302af234604e65249356574f7d7
font_02_sfnt_off000159fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FA 17784 bytes
SHA-256: 176c70cc69972845c908cb8e192c5c3e2bae24774c4ddb2d650f972b66f4c3ee

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