Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c7ebae1773401f7…

MALICIOUS

PDF

66.6 KB Created: 2021-05-17 13:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c4a1cb65cb9f25a57bd3fd842f02e2d SHA-1: aee6698daa2ffc677557b615065834d6b8d5eec2 SHA-256: 0c7ebae1773401f7a40c8eaa80524b0defe5189d219019f2084d6b555bd863e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used to distribute or redirect to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8377

Heuristics 5

  • 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
  • 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://entone.es/wp-content/plugins/super-forms/uploads/php/files/0cfaa37509dfc7d8e13d3497da7fe461/togazipuvibaroxomaxe.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/583a986cf3460f6b28ab0e92695ce88e/joxizalakubi.pdf
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/029d18dfd6f7e3af2bdeab7204812d53/saritufosevedifox.pdf
    • http://abpaluso.com/upload/file/gubike.pdf
    • https://luminex.pl/upload/file/jusaxujebopixadefutuvip.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/3aaefbf9df68cb5732705f463c0c6282/vepigopizejisebof.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/84l6v3lnirbtk536l8d0i09jr3/30803617740.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073452b942c2---88748904168.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5f8674970de4aa2c90f069febab3a659/2412043969.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/hhp6dvtcl47l2elkued8gt8dr4/8958593934.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/9d05b328f7fec185027eec16b285d5a1/nusoxisami.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/d8b3a9fd84c38cfe0e87ae7db19f1800/tizugebawubimemozenoru.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/0825a7cf1b44a5a7bb249ac8c742468f/88065230924.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/88e6dadccf2eeca026b238b016724b93/vimigodemeregubegopomab.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/gumokoiaa0c66pcetjeihvpfaf/80106477948.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7ae467b54---80640586345.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=google+maps+alternative+android+privacy
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddda.bin
f42e297719a46b3c4f4d1cda368f036d83be691871dfeeff587f6d5e224040b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 5372 bytes

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