Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ae88caadbebe552…

MALICIOUS

PDF

87.6 KB Created: 2021-07-19 02:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4e73bc0b10d3d726dd2fc23035098d22 SHA-1: 51af8d36a45de1eee044669d748bded1f663875b SHA-256: 7ae88caadbebe552d8dc12eee8da1c86a1599a43ca502b2dc304b58ce6af76cd
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to websites hosted on compromised Content Management Systems (CMS) or utilize disposable hosting, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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 http://bocghedanang.com/media/ftp/file/49359413794.pdf In PDF document text
    • https://xo-sound.ru/userfiles/file/tonuzilozoverogolexub.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/f68e354ec18f2a565d93ab664c89a63f/77235132343.pdfIn PDF document text
    • https://flyags.com/editorResources/file///puxesig.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/f66f9015a4bfaf11adb2606c754ceae2/74118925201.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ec24bad29a5709d031f6b9b997ea877c/kakajifutupoj.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//vipikememuk.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/9154730883.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/70287dba43ddc6bacad0b05b396f46c8/lanofisovejomeragagegojaj.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/7169213429.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d68740d10e---xovotawolevogivugejawifi.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/97331104380.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/tuwedadowilujekumow.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf518c8d7b---genalizewi.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/90023489466.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/290dd86f0456f7e0f8bff6e16df2444a/78834825873.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9d53385a2b3556098dc597c3190462bc/nujoterusodokasep.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/21809110381.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9860388c4d900d0545906f4a74689e04/jijinakixosuwija.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4f3156e57---rilofes.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/07b755cccf1efd67749bea42eafb32a7/jabutegijokelerolevani.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/19662021952.pdfIn PDF document text
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/bezugivuteba.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050223485455.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609993b80ec82---xemok.pdfIn PDF document text
    • http://newcastlehigh1967-50threunion.com/clients/43248/File/vemibixabuvupujerasuvi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=pdf+to+word+converter+online+full+filePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 17092 bytes
SHA-256: 810969d8bd5a22fb715ce02c37593ac7f6aeace6d48ba2665f104c45be7ed1fa
font_01_sfnt_off000120e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E0 10392 bytes
SHA-256: 956906e90ac063d430254b008acaef7323abfed8cdd2c4b7e33cc478f34c9003
font_02_sfnt_off00013893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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