Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e11e0ff5837fdd8…

MALICIOUS

PDF

61.8 KB Created: 2021-06-24 12:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cafc238291b2e25a56f98b04028ccf04 SHA-1: b057859e0b6380fb7dc304879dc5aebeb66c9487 SHA-256: 4e11e0ff5837fdd8f997066b045186c66888a269d9c57d81ed04d1a04c64df4f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The presence of these links and the overall detection suggest the file is used to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/8b1fb1d32a31f35882189770d97561cf/naxapinid.pdf In PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5011b8f25---tejatup.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/7f9f78628263ccd6436d38db10ab3146/kiwazedifelonibutirinaxa.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/59590580791.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ee8dc0c78---jonokaxat.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/36517167503.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/96e46888159c153dd3a261e95abf3d3a/20899420032.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/xexod.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f02526475d578f415ffafe8ef6851022/94381509548.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/zuderofexezu.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/lifulafa.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/b8f7f8879dccb88d0c470bc0b1479284/reduxibuvekivox.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/vagok.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/fagibokaxigoxokefabijov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=siemens+s46+59+manualPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA60 5360 bytes
SHA-256: dcb463abef034717e2819ac19cf3e66d80db11a3d0201b92f13512f449fd6bcb
font_01_sfnt_off0000bc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC81 2596 bytes
SHA-256: 81b417f005a50ca46b4fa1548e9eeaf2b00f1c42715d9141257dcfd27efbb623
font_02_sfnt_off0000c7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CC 9948 bytes
SHA-256: dd6f315a49cf2beeaa074df8315cc1f79919718a84f0393acf23c824c5a4c48d

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