Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddaed2d9755e4fda…

MALICIOUS

PDF

73.0 KB Created: 2021-06-27 07:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 79b092e088b0b06d922013d89d03af23 SHA-1: 241845b8f8c2dcd97d24968dd641a6e6d309c5bd SHA-256: ddaed2d9755e4fda3c2af3f801fd2af8022681a7ff647a8b961a80933b211172
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of these links and the overall detection strongly suggest an attempt to lure victims to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://allytemp.ru/uplcv?utm_term=after+2+watch+online+free
    • http://lumieretvie.com/userfiles/file/74382019434.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608c66e1e1583---jamezi.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/ekaj1kgq4qu37mmg3j5r27r8u1/denadiw.pdf
    • http://talleresjpg.es/img/file/9605474839.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6be2b4ba---fapelawarovizi.pdf
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/c421b1046303c8ab6550da2c773b52c6/zefimupovixefexo.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f83101e38---92457375839.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850364aaf4e---2183135054.pdf
    • http://standartbio.com/fckfiles/file/25210552399.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9aj21apgklhj5ikafmloka6d6c/busukasuwadeganu.pdf
    • http://juentai.com/userfiles/files/71094478096.pdf
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/5396757620.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc7a66525e---18837037857.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/62d4606fad4ea28e31678aa00e2a632d/60745519713.pdf
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16096aba8918a3---32059060812.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/32g1fpe37m11959ps42nlsecl2/natuju.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/7q0celtk4a3p7afh2t8lhaljt3/83746450547.pdf
    • https://fotojursa.cz/userfiles/file/negepataperevozudodosapiv.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31790ad714---pukadu.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607782ba3f436---jesalewowuzegopelobisa.pdf
    • http://amirafouad.com/uploaded_files/file/tunedikewovaditekanubow.pdf
    • http://hhsbluebirds1967.com/clients/b/b5/b592d679e9980e62d9d56be1bfb8b6b6/File/migufakadokoxuragita.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cf982375a---65728844081.pdf
    • http://andlupa.com/userfiles/file/90245679401.pdf
    • http://sosnovgeo.ru/userfiles/file/wunebasuj.pdf
    • http://omonetach.pl/foto/ilustracje/file/bakimu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc07.bin
b2761c3854938bd31b4885b713697e6fca88897999a47d4b1aa58ade71c429c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xBC07 10452 bytes
font_01_sfnt_off0000d3cf.bin
8b37f1c751730a87ec026fdea13384493cf58206515dedffec0e9f97dc2ea63c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CF 16448 bytes
font_02_sfnt_off0000fe75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 16792 bytes