Malicious PDF — malware analysis report

Static analysis result for SHA-256 074ef31e52ecb9aa…

MALICIOUS

PDF

126.6 KB Created: 2021-06-10 00:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f85c0be6a3ce09bf10c04eee1690065 SHA-1: beedc46d176c4f476baeb80e75b09b61258b2c63 SHA-256: 074ef31e52ecb9aa1ea424d296db2ffea52849c4aabba94b9fa615931e05e1c2
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous PDFs hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9552

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 https://pixomot.ru/uplcv?utm_term=psp+games+under+100mb+free+download PDF link annotation
    • http://coffee33.ru/archive/file/80359680779.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/rg2m777nr6v3jlds4ub4l8lc21/43743175253.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/jibijuk.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4dd3399f5---bopatot.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0d3e1e65c---78443544780.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/a0844f63ff684775994e55773c0084ed/93148969908.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/44913323011.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/bemefizudixeromamabobis.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0bddf69c348c91e25e961bff242ac984/zaguvofajeganofaxotevafeg.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/3ed49350c6e0034fd3ade47690702c24/fededoxeper.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160720a45e66e2---xegowolo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609a373f90aa7---9201340390.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9eedb84b---68445547476.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd010cf0a0---50926504724.pdfIn PDF document text
    • http://vejwun.cz/images/28385210566.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/vibibulajibakisalu.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b735071f668---nikimoli.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/6092ntld4tgb1k1qislfu952na/fozor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9E7 2952 bytes
SHA-256: fd8d653340cd8aef92e36da9eb4d4c5d9131250bfaee15d2ea69fa9c8c0baee2
font_01_sfnt_off0001c46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C46F 5788 bytes
SHA-256: 53ec7df0bd88c646560d86972c729d2cc37224a64fd4cfd20b31aba95f2a2760
font_02_sfnt_off0001d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D825 12112 bytes
SHA-256: a65334f3805ebd758522c37823819b8789f874f4daf1193d1220b459b007c74f

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