Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46357dc96b95937…

MALICIOUS

PDF

77.7 KB Created: 2021-09-09 01:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d9078f9596cd7c0b4f104a44019c98bc SHA-1: e327dcbafbfc52b497f51e05a2e688db98d2bb6d SHA-256: a46357dc96b959371e95e0f6098e43ef2445ae76ef9852a053901f57f5f5283e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and link farm structure suggest the primary goal is to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pixomot.ru/uplcv?utm_term=a+world+of+fiction+2+pdf PDF link annotation
    • http://teakdeck.pl/files/file/nukinus.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/23169280924.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/e8051ef268feff91d3ed6588a4b4d5cb/5475490162.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/72870773358.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161319cc414663---77909745931.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/26289551204.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/boxokarevazelutomek.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/8e089pcfoa4nn82g4inck35u13/pilumimuvekapa.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/zitokiduwuj.pdfIn PDF document text
    • http://arablift.net/userfiles/file/vojigoro.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/25572179485.pdfIn PDF document text
    • http://dgkno.cn/upload/nogigomofukotolik.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/vopedobekiname.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/32145978177.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/82054299695.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/94229046529.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/vefusafagakibo.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133edd632a4f---veminiwetiwisege.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/pubawakulepitepulosaj.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/76488687571.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/23539343769.pdfIn PDF document text
    • http://studioego.cz/userfiles/file/jiletobunevetasopijaduw.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136331934002---jiwesafixazola.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/tilamedobek.pdfIn PDF document text
    • 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_off0000ccaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAA 10336 bytes
SHA-256: 99eda293d95cc571e28a3bb53ed064ae5cd53f91c8a0d337d10c492d8ed47034
font_01_sfnt_off0000e421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 17528 bytes
SHA-256: 7c6458c0d1af80c2ae314c1f24cf14d851e65847996774c461ff65218b9d5178
font_02_sfnt_off000111ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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