Malicious PDF — malware analysis report

Static analysis result for SHA-256 8deaad7b0004c571…

MALICIOUS

PDF

92.7 KB Created: 2021-06-30 08:19:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5ab4d3d2277f77770966197fadf2150f SHA-1: f7fdcc10bc9ffc5809ad7433273c65f59ce97b63 SHA-256: 8deaad7b0004c571cdd714bfa89e895fea18a5d45e1acff8fa712f03edafc7fd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to compromised WordPress installations, suggesting a phishing or malware distribution campaign. The file's structure and the presence of numerous links indicate an attempt to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://oniceh.ru/uplcv?utm_term=rise+in+sea+level+due+to+global+warming
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073be6082bf1---raredomisumid.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3119abe1---25314371764.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/0109b25889ea6d8ffaf96e2e3f308be8/mofalabiwuwixezas.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/388876dc2187a8548ab05449457e5a51/lanoritazevububigonanefo.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55d5c1320---zovuxepatawa.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/7c0f3a284ee6a0a6936c902c7410b4cd/20731737377.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081088b3a875---82524369240.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/19f0d4c459afde93be78615a41078a8e/tisunedanesezeri.pdf
    • https://ludifrance.fr/userfiles/file/lekuzutuzerudupelosa.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6c64388e18e8b5df94f4765a76c6c168/7792254383.pdf
    • http://romanakladatelstvi.cz/userfiles/file/fuvufubatuvoguluzututet.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e1cebab22fd0154cb3870e3d8bb1ca3f/78931092728.pdf
    • http://progfin.pl/userfiles/file/pusofotaxejabumeta.pdf
    • http://ricarda-allegra.de/userfiles/file/15491647254.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098832966d65---logokeramopujomusobo.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/36652571357.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd4a90ff1---90135277966.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786a624fe98---82042590604.pdf
    • http://chono.mn/uploads/userfiles/files/xubidatilum.pdf
    • https://unserbiokorb.ch/userfiles/file/rilegemobokadigedaniv.pdf
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608099eae9aaa---nolelodudukajawujitireli.pdf
    • http://asbazainville.org/userfiles/file/tixusileveliwotemebixak.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001086a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 16792 bytes
font_01_sfnt_off0001207c.bin
44fce41c291aecfc56f118e0e715cfbe198aa936913c8035215ecae5359911c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 16744 bytes
font_02_sfnt_off00014c0c.bin
4d7eb38f8f03d59b4d92ec32b49b1059ae1086cd118779d862b6ac7efe07a790
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0C 11028 bytes