Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e3c5c0dcbdb5ad…

MALICIOUS

PDF

68.1 KB Created: 2021-05-22 21:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ae364f66506737dd12ece6fd6c5b02e9 SHA-1: dc2a2c149a7928231151bf369bca1c9a78ad3940 SHA-256: 02e3c5c0dcbdb5ad1c990104b1665df5434c9e2ecae61ae5e7e52edf98002d57
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The embedded URLs and the heuristic findings of 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' support this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://aslimitada.com/userfiles/file/58847237145.pdf In PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/78utfk2fmg8v2od6j60h6bgsoi/pixedikorojifolomexuzem.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607666bad4b10---todelefaxota.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/jegubamuloxoviwopu.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/bumow.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/4af6fb17848d6e5bbcc40a98885831f5/xekoxomo.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/11fb78c3a40d2c287967e7db71b19413/76120020731.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/vazumubomakupogaxoxo.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/6f5e7abf1a7b449012d3570d67fba797/95880045798.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16084c1aa47a1a---2490599289.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/r549m3adsmhk0kt4kdg8rjuf1e/rerogulofukurividutiwixi.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfe7b5a61---sudepimuxelufonifobip.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc7e1bc274---tigedigumodubarene.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2ce5d4cb9---43818633462.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/7f41d834ccf48516fbbe76b7f0d331a2/ropifubepaxuzivufif.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-15/20210515205205324019.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093b232cd204---16937365908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=where+can+i+find+pallas+the+silencerPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 5256 bytes
SHA-256: 6cb6ca535d188b0e78dcdf0f1d24207cc1a1722783bca6c69b47dfb3ba2d0769
font_01_sfnt_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 10520 bytes
SHA-256: e99c53b8a8926c250e7d8a511e12b3af88f2aa4793cb94f3ccb2e03aae014a08

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