Malicious PDF — malware analysis report

Static analysis result for SHA-256 5219a2d289f2c1d8…

MALICIOUS

PDF

113.9 KB Created: 2021-09-22 09:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 49683d322d0d516c122c315f26b057e5 SHA-1: 508193a43c9b11a21becdea416a82c15a42bd534 SHA-256: 5219a2d289f2c1d8a9071386f812b6858582a6a4561c2bdc077d1bb2d5c1d956
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting. The embedded URLs, particularly those related to 'venom 2 full movie tamil' and other file downloads, suggest a lure to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://otohondamientay.com/upload/files/50802203593.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a36627ef9---83086886391.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/bexewevajomiva.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/95512396245.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/lidoxijaxigajopemaleju.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/soturovoz.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb4bcd3ed7---85868359027.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/kowinuju.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/vesimukafamusagebebolikex.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/98089458553.pdfIn PDF document text
    • https://agmatbaa.com/upload/files/87275803494.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/12734919451.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-22/20210922143410978486.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/gafabulisosof.pdfIn PDF document text
    • http://acelybio.com/upload/files/kutexerozolijaseveped.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/tekudokuke.pdfIn PDF document text
    • http://norrlandet.se/userfiles/file/vesulujaba.pdfIn PDF document text
    • http://bienbao.net/uploads/files/fexelomuledapifejoj.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/68037907225.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210914_4327CCE67ABF2F51.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/rawudona.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/42348390909.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d33ebae31c---46849559840.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/vibojikewofikagewu.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/tezefaderipij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=venom+2+full+movie+tamilPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001548a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1548A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C9C 20604 bytes
SHA-256: de1ef4dda929c9de0e77bf63d6bb8b63a0840544ca374ac48ad7f838f2f9b4a8
font_02_sfnt_off0001a24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A24E 10360 bytes
SHA-256: e14417bf6d50f5fa767d5cf8c472122c0cef1ca3764f8966e41cf8af9dabfc85