Malicious PDF — malware analysis report

Static analysis result for SHA-256 772f0c6043a116af…

MALICIOUS

PDF

62.7 KB Created: 2021-06-01 17:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff17b115064ffa1240a0242d51e9e38b SHA-1: 3bcd6fd84823afffc2aa65a6ab5d0eafd36ffdf1 SHA-256: 772f0c6043a116af230c2ff6aee97025e9fc953cbec874e7c1d6c1b4870cc93c
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9594

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/fsc3f37ljiabdjfmj9de35bnl0/kenoxagonuzadoz.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b4fd9b59c---somezulunalisizu.pdf
    • http://arunimaflavours.com/userfiles/file/wulidejovukukawinesojam.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/jrnjs8um7t8bo1lnlooeae7k05/tuseziregikewitakeral.pdf
    • http://renovator.cz/files/file/tizimorulotivuzitaxusutex.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607165cb2647c---taxegokorokinewotaje.pdf
    • http://ascensionchina.com/userfiles/file/16915262832.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/ebe60da8c4b448c6d6921d43471d35ae/jiramelovonovav.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094472a1f47e---24583303591.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7f7d97763e2a14a342e73b681523dc24/55596551855.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9a1b600b0---niguve.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/906q1g499hhg402qqac3fu5lge/nimolir.pdf
    • http://lab4050.com/upload/editor/file/29398921337.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f96480dfe5acc776922dfd5c33ef5468/99012900602.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/dsp9d94op71skdndr9vrl77pu1/49178088341.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+lagu+mp3+naruto+shippuden+opening+16
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0e1.bin
0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E1 6744 bytes
font_01_sfnt_off0000e1c8.bin
b545a2db3d82552a530a5b4596e2bc714439c4f4468e147d72e3ffd1a6d3e8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 5832 bytes

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