Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc629c90a85bf1d…

MALICIOUS

PDF

88.5 KB Created: 2021-09-17 02:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9b1868eb2ebb7fae0e37a57cf49e5b69 SHA-1: 7a7994325f87965cec86ffaed436ad44ae4c3a0c SHA-256: 5bc629c90a85bf1d01755208409ccfe7b18d3d29dca4e28175dd3c2a0edbadfb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, including links to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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=hbo+max+a+quiet+place+2 PDF link annotation
    • https://siemreaptraveltours.com/userfiles/file/muzesomukotul.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/85797753740.pdfIn PDF document text
    • http://flomojapan.com/upload/files/22653778528.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/loretavatufekixi.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/82039472612.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/lutinuxolosoniv.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/setuduzefo.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/romipegaxilizusokuwos.pdfIn PDF document text
    • http://vlajkylevne.cz/UserFiles/File/17056708464.pdfIn PDF document text
    • http://okun.su/upload/file/76426283216.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/nolujupomonirojukatiput.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f130ff092a---jitopudonoxawi.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/71c3bf9026292dd82b5a83e3a8d3b0e4/45878189206.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/67296323424.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210912_030647.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/53013857624.pdfIn PDF document text
    • http://columb-sklep.pl/userfiles/file/rodefotofutupibisu.pdfIn PDF document text
    • http://netart.hu/userfiles/file/90413249758.pdfIn PDF document text
    • http://detskypohar.cz/upload/file/59101433061.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/jusenekoropixef.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/19811528692.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614013447acef---21199517675.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A1 18620 bytes
SHA-256: ea201ebb1dca65d80a7325be7b4192912e71bc9c4c01cc01fcacc3ce4aa37478
font_02_sfnt_off00012207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12207 10760 bytes
SHA-256: e5be7e3920944126639672fc5cd8355e265e2ad5ce045fe9366b94d3f85592c7
font_03_sfnt_off00013a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A97 17136 bytes
SHA-256: 9a0cde8bd21af14c5ea73d05280f241b32957221035a2354806a9c50b8f7f746

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