Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42653af9d3253c0…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 22:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 22f76e0e5c16746ca1a6e5d20c5cd0ad SHA-1: 16ebc2a37c77a50e88be1c0d2613e81d9a2e8ab1 SHA-256: e42653af9d3253c08d1790bfe923241c2b5d9234d10b30e9d4ab1810f04bbcbb
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress installations or disposable hosting. Heuristics indicate this PDF is a link farm designed to redirect users to external sites, some of which are hosted on compromised CMS platforms. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://tempegaring.com/contents//files/mebojiputopapo.pdf In PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d86f3463449675e43d6d4a5dbc1fb491/31565156373.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc8d04736a---lojamemixesela.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/ratasuzatejowawukuwapol.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/a0na2cpd4aui9er8qv2gvff4ts/ginagibesibovutizuderor.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/a039540bcfd3b2886b95989d57846962/nazizunopibakuzalivuzatoj.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160d99f259c627---gavaf.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pplomhc72vssha5on681f7pe05/88690427640.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/61767038495.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/nklr5d2gm0u81drkdn194v5mvn/difubiziw.pdfIn PDF document text
    • http://dzbnf.com/upload/file///muwexum.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/02if5dscorsnnr0p9u1r8na5e4/sinasapugakugofaburizaju.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bddc40e46b---jojotukuw.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f5a484e0c---dopopefesoruw.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/denirapuxitibewofamu.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/605b132c19c3c5721893e86f117fa3b6/41954471516.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/69808050652.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8hvbg3lf0assqp7ndntlf3e4dd/sasavematovadugeg.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/fvmf0miqqtamsnv5s7eq2vim62/kofuseditapixejunob.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/9016065fee597fbf0064f6afe81a3c32/zukaveritoves.pdfIn PDF document text
    • https://lepjunk12.hu/uploads/files/jimilijalejetusovu.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/36520314251.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/co0q7s8d4qiojvq7fcn7bmrvd6/51128393789.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/92947637783.pdfIn PDF document text
    • http://nakamurasangyou.jp/app/webroot/uploads/files/70311638126.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d54ceccc84---gasefufotizibozefenefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=about+fasting+bible+versePDF 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_off0000f02b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02B 10676 bytes
SHA-256: 92090a961e32866d9a6f716ddd3b4a66beffc00800bb6360658145e6bd462d70
font_01_sfnt_off000108d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EA 16788 bytes
SHA-256: 83a9470f304e8d7b75020ab5dd66113c15cbf4b0eeb49173e1176d77cf00a050