Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06688831672155b…

MALICIOUS

PDF

62.5 KB Created: 2021-05-21 15:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e23c09364817b3ee9a5c39eb75ed12 SHA-1: 8684625c4b6db24335d7ee8e78755c74d86adb90 SHA-256: a06688831672155b0a047c2af4a5932c0e19c1838c08bc594316b68d9a71c37a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous external URIs and links to compromised WordPress sites, suggesting it functions as a link farm. The presence of these links indicates an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8016

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://allytemp.ru/uplcv?utm_term=max+payne+3+social+club+in+offline+mode
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2d66b6ecf---bazazovo.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c5e887dad297d01557f3159380b84c9c/xifamexodilil.pdf
    • http://www.aadhar-interior.com/userfiles/file/tarugubiratatuxir.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/08347d09ea24246d2d1663e87588415b/sefikoruza.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c04098ae83e21200201ce1ba81cc8aad/gawulasofedud.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db449e10b8---23411559579.pdf
    • https://bookatowncar.com/userfiles/file/kerela.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16089505d0723a---14876723224.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15ddfe799b---dumotorobexibeximuzose.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071702664739---mofadolifonokenuna.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a68227bee25---xewenawujokige.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/1860c03bc9d59ca1c23f3d9ea42ec95c/79754045652.pdf
    • http://szao-spb.ru/images/news/file/tilojurop.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e486651e48---nojulebemodebu.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/bhj58p4bj0g5jr1cfdnvjnqnt0/95348124207.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9fa19dc44---4432976239.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/e8d357483cc84f096d321d5732423e8e/7295361976.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091814607328---gofaxukiwivekivurokulim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d400.bin
a2d6ef9cb40ab1f772f0f2d34b5ef9faee23b9a4ee153635d93f9a71f90979cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 5684 bytes

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