Malicious PDF — malware analysis report

Static analysis result for SHA-256 701f2df75c16e5c7…

MALICIOUS

PDF

64.8 KB Created: 2021-05-08 18:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 723a91d7d42d044f97affae3f391cd23 SHA-1: 6094405e78c1e258b9ba8c4c28980f854ad40918 SHA-256: 701f2df75c16e5c7f1682e2ad0c598e265b418b2727f7eebe54c78a68e4c6070
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting an attempt to host malicious content or redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8592

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dok-vo.ru/userfiles/file/74876005633.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/e2d7313f914d6d70fa1ac2c57921e86b/devikifotenusovomitusita.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf217f083f---26135021962.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/met3i0k2s0i0boflr9plpj2odu/kuxinepeponurubajojubabin.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/baa59def76ca83e9b22fcaf0739ee481/65082991751.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160922d993b197---28508404203.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d3aeccea8---zidivubidajeju.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16082b6e3d3ac3---wukevedenitiset.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a1325e89a---kuzebapomefu.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/df4ba44bc4681bcf103bbbdfe7b5b0b7/50802684556.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160790915c1a4a---70815215866.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/8b06f3b463dab3d2d3751a4ce1364c1d/xonere.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/nq46m6choibo51fvn1at6qbcpf/3767137026.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086afef21caf---bilofikefined.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16083d5020234b---zetawoseroginagupo.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4555eea03---tubowomej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=billboard+music+awards+2017+performances
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cee1.bin
2257cd4925c03057b57d8c350104415c2d8fe59fa74cb189e54679f4d392107e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 5988 bytes
font_01_sfnt_off0000e351.bin
950d1be14922f526acada13d0d7f0fc7bdc44beb4ed6a74c0764c2a4e309aaba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE351 10532 bytes

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