Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f53322114c37f2…

MALICIOUS

PDF

82.5 KB Created: 2021-09-04 12:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: edd34211b070b7f737b1567f4de8452f SHA-1: 19f9288eff5275802f71b02a0ba7ebb6fff31ee3 SHA-256: 96f53322114c37f2da10ad000215abd42aa634cb6d6ae4348b75ac14566386be
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external PDF files hosted on various domains, some of which appear to be compromised CMS uploads. This pattern is commonly used for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://chcial.ru/uplcv?utm_term=ogre+kingdoms+7th+edition+pdf PDF link annotation
    • http://sns-russia.ru/userfiles/file/fekesoro.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/4549230936.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/repazazofetakena.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/79407889799.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1cba478c2ec84e2e80cae341fa35ee52/senuvewezikujopitebozes.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/zenatoritodubodupodo.pdfIn PDF document text
    • http://kurdumovldpr.ru/uploads/files/julin.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210819_E16E121779A340FD.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/jejasiboruzukafilekon.pdfIn PDF document text
    • http://effektfilm.de/files/file/pexifolenudutoroweso.pdfIn PDF document text
    • http://huntland.hu/upload/file/57742383253.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/814db457badadd91b13cabe552254875/suwad.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a90800672---bufegezulapidonifovivuki.pdfIn PDF document text
    • http://daeryuhealthcare.com/ckupload/files/48934497270.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/82206312153.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/90720987603.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/79443520658.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/57829299447.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/33592496972.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608594177df37---gazuravalipad.pdfIn PDF document text
    • http://hasyo.net/files/file/89342934039.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/h20tnqdghpq1i0o7cltsd0al5e/fagap.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa69f1b0aa---42828060298.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/nedejet.pdfIn PDF document text
    • 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_off0000dc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC81 17988 bytes
SHA-256: 2eda5bd646b407ebfdd59ca9cbb0fac7cc8c14e5e14282649087acc75c5b8984
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 10904 bytes
SHA-256: 95e1efa15dcfdf58d638a01c6304c844b6b06b281c076a0612c6254fb733ed07
font_02_sfnt_off00012460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12460 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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