Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04f0822ccf0a3a8…

MALICIOUS

PDF

76.1 KB Created: 2021-07-31 22:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 81dfe25ca6fd0c73b27a3b0961b8c95a SHA-1: 95e1bec41743e7267f428b32316a2c30679e5606 SHA-256: d04f0822ccf0a3a8a69cbb32e19bf5ced81b2b1ab1b07c10497a6e259c6d3283
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9690

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://vinmexindia.com/uploads/4003929307.pdf In PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/tapalunubivadoveruvageg.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/8cba8b4206e57acabf9fbb7cfc0f95c4/donowabadubovasemikutoz.pdfIn PDF document text
    • http://olynskiconstruction.com/pics/file/98680487454.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/56115711483.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/tirakirofovisenazegob.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a2e695bca---fofedexipisuzesos.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c103119b0a0---30153307912.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/kukkhhob3kq3q6jnfh1nhnrjre/fifijopozoxavoxevipuguxok.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/6bc6c13f12e4b062a4ac4ad0c282e30d/fifojakonafosixebili.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/5858016598.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/302942005ce1d5ab91beee2c34bc3dde/20600710516.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e791ec5c57a086f4af7445e940953e26/gupekebul.pdfIn PDF document text
    • http://heizler.hu/files/file/32531550744.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f48474791d---14278828672.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824c8d60e64---lomaditafanofif.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9i8e1qll464mbipplb1nl1mqb6/15536895472.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/11666944871.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/mezavomilugizibipabole.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/nadejuw.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/k0n5k47uripi2dh0v013saslh4/97036419556.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/16075b3ca29ad1---32661847115.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/a5f6bf5a4254c9274d1350806902bb77/35109998998.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1608620e4bf1d7---vepigepo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/p7ej7vbu0oupn48af3hs1m31s1/26882946203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sumas+llevando+y+restas+prestando+para+ni%C3%B1os+de+segundo+gradoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 17528 bytes
SHA-256: 67687a1999ec1fea520e7eacecc5496ad7bfa7e59751fc707b6df906a67b7ee4

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