Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d492ed2e4e56388…

MALICIOUS

PDF

73.5 KB Created: 2021-09-16 09:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c43c63b9b02820576309e2d37e5804f9 SHA-1: bdbd6b076abdb198494ee2f4a0ef939e51bbbf46 SHA-256: 3d492ed2e4e563885662dc30280f41be5f8a96332b2409740ac5cb57deab9cb1
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites, potentially exploiting vulnerabilities within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=combat+tournament+legends+no+flash PDF link annotation
    • http://ipai-bg.eu/img/file/89021943691.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/semimaroxodewu.pdfIn PDF document text
    • https://emartdeko.pl/galeria/file/73917443561.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/kesawexujutipafawaluga.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/jejibotinilimaxar.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/83341859575.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135761c3770f---tejagupumepakujiwado.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/kajipomoxusoz.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/dupasu.pdfIn PDF document text
    • http://sanraimundo.cl/dyn/uploads/file/toxijusilepotebomadilug.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/zevixowiv.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/14668679696.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210910234444.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/52766130366.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/87260497920.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/guxovuzuxazedefilupo.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/97472858205.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/vovijopikopabadotiwijuz.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16136f9f1630f3---84942578974.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/fedatavafi.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/9372383763.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/malim.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccc67ec32e---keramunaxamobosu.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/23475212941.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 10980 bytes
SHA-256: 3d59f69ab75c470fd171b6076fbaec49a512b4a3e37041f2f4497509839d4bef
font_02_sfnt_off0000eb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB77 17092 bytes
SHA-256: 0a5371947eaf7236c55a71b17b42726499e47ae90b8e02c180b66921f618b710

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