Malicious PDF — malware analysis report

Static analysis result for SHA-256 96246eb00c536142…

MALICIOUS

PDF

105.7 KB Created: 2021-07-16 12:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 450876cb0ab4c0590542ba1673964ad7 SHA-1: c1502ebb8f4db7d71cbca5e1309e8753c002aadb SHA-256: 96246eb00c53614274de63ef95927180eda05aa103d39b678fd17982b0deacf9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b28fae1e6f---27775491902.pdf
    • http://www.icareonline.net.au/ckfinder/icare/files/jijunozit.pdf
    • http://aitrans.org/UploadFile/file/F1202105181020467541.pdf
    • https://plasy.com/uploads/file/78630722576.pdf
    • http://nadiadsa.org/userfiles/file/junuwitesum.pdf
    • https://vasantviharproperties.com/userfiles/file/metawekokagazokubixebil.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/of1q73vfh4dfck84n1unf34463/73165367462.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/jatamodojasula.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/gu0jonbfobdvo2sdhafbdnhu86/28091785272.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab2c3a881---69214663313.pdf
    • http://straub-online.ch/userfiles/files/77831618804.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/btm7fcmlqjqrfc3q8j20ukqvnm/fojidisaxuxoxosa.pdf
    • http://bettekingproductions.com/clients/874300/File/larabivewomuto.pdf
    • http://lezeckastenakosice.sk/upload/files/rowetibifuraxojixirukove.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6c61b119f---jirizerowiso.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/43b62f0683ecb0096aca6bcc4e4779fe/kiragukizugexisuvutekabil.pdf
    • https://davaocarrental.com/images/file/63265394688.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e602a971a---40559218298.pdf
    • http://heyumpnd.com/userfiles/file///39376775503.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae694a7dfc6---57106344329.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb5cd3c745---66723459364.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+switch+gears+in+a+manual+car
    • 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_off00013a71.bin
aef649a3eed393395af59e94db535c4226b6b3049ddf0aff3e4d737bcf7d335c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A71 17488 bytes
font_01_sfnt_off00016873.bin
37fe6b9e6758d908c1d6654cf5844d15d28970cf234131bf1f4f5658e1bc6b21
pdf-font-stream PDF embedded font (sfnt) at offset 0x16873 10856 bytes
font_02_sfnt_off00018165.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18165 16792 bytes