Malicious PDF — malware analysis report

Static analysis result for SHA-256 0821fde60d5be25c…

MALICIOUS

PDF

81.8 KB Created: 2021-06-20 18:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82226be3eb5d119eb55d96979ad4695c SHA-1: 02cb7c8084cbb9e274a094ede38580b3a63e7b7d SHA-256: 0821fde60d5be25cea2aba6f7d4165046c433f701a19b37938aab5492e7d7cfd
174 Risk Score

Malware Insights

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

This PDF file contains multiple links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The document body, though heavily obfuscated, contains references to movie titles and the wkhtmltopdf tool, suggesting a lure for potentially malicious downloads. The presence of numerous URLs pointing to PDF files within compromised CMS upload directories indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8886

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=vinnaithandi+varuvaya+full+movie+tamilgun
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a28e8cc2e---ziwozumurekiwulifupibez.pdf
    • http://ankurgroups.com/userfiles/file/25588298729.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/91678d037f2ba81ca00418d52d6bafa2/jezelox.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/c5b6b50033f3c58ed4566a35fca5f56b/56471444751.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787f07c3957---pojuwunupanelam.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9fe2f045a---68876832734.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160821371b352a---rokalafenizimesut.pdf
    • https://gofropack.com/wp-content/plugins/super-forms/uploads/php/files/1890d0c1e5da42bb83ad0ac0e62905e9/zuwadateku.pdf
    • https://abeess.com/userfiles/file/rerot.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160792626370de---90928797834.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c48894cef85---jofaxekexodosatosuri.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071901f31cf7---90128982144.pdf
    • http://domholidays.com/userfiles/file/65311295771.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mn89pj61qtdgkk1peaibfvkp73/97528191459.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160acbce82613f---98434792347.pdf
    • https://dalilak1.com/userfiles/file/40712091392.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010764.bin
f6b597769a004f00c25d0577c9cf2c63375ca5e235bc238a37e8bbd3a415743b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 5272 bytes
font_01_sfnt_off0001193f.bin
3ca81359c07b14b87db9544825e595efdcabd520b68be29f1f82e066f39052c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1193F 10984 bytes

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