Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b425904998342c…

MALICIOUS

PDF

73.8 KB Created: 2021-08-21 04:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4f630a54dabfe8afe9548806e23a439 SHA-1: 83619dcc92d2fc203845f096249ccb60801dcb2c SHA-256: 70b425904998342cbc48c05657b704215641f3193fb5dd38fd57caef6de19778
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://calmoinc.com/upload/editor/file/baxozuw.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/jv9l1mff4pn9rhk4aqs8unme67/97494820740.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a366a122de7---81924536310.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160a3323e55619---55475488698.pdf
    • http://enricobarraco.com/files/vivolurunuloborixokasoker.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/8m3rcuarn0pod20ccvumjei46p/sakadab.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8f501491ca9f9e23e201d8dc179d0135/93172615373.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818399f37d9---76699107848.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ab9e2128---65593429866.pdf
    • https://renault-service.com/userfiles/rasililalerakazol.pdf
    • http://relaxzenter.com/uploads/files/legageb.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/qgv1ft841al72j4v3k9ftolgqj/92056803379.pdf
    • https://299-45.com/CKEdit/upload/files/riladomisabogeboka.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aafcd338c2f---15990734526.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/30766944fbaa2a8231d27d7254413a8c/95926803686.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4ea0a985b3b2bca903a9c190cf36f503/70193783805.pdf
    • http://alituncer.com/userfiles/file/gakakaga.pdf
    • http://mail-business.ru/uploads/file/rezavasijo.pdf
    • https://businesslife.com/content/file/puneronewijapeputugubo.pdf
    • https://iwnta.com/userfiles/file/ganubiri.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd56b1999---65498535024.pdf
    • http://alliance-ltd.com/userfiles/77347778465.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=yedigenin+i%C3%A7+a%C3%A7%C4%B1lar%C4%B1+toplam%C4%B1+nas%C4%B1l+hesaplan%C4%B1r
    • 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_off0000bacf.bin
7c451e1ddaef12a340495d999c70e9178f61bce1efce9aeb7d850d118a80c0a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBACF 11064 bytes
font_01_sfnt_off0000d415.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD415 16792 bytes
font_02_sfnt_off0000ec27.bin
6060950f505e33ad5e6e24096343d4fcd6403a3eaf6758afad9d7e4b9fc9ffa0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC27 17300 bytes