Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62c33127af1d38…

MALICIOUS

PDF

80.0 KB Created: 2021-09-06 22:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 816b775b2f851751dab7d9b3e67b584f SHA-1: a4def7f2bb5c8b616b94424a613893281eedab1e SHA-256: fe62c33127af1d38cee3514e75c5a3e650172eefc0a72e47412478e5fce443e8
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body is unreadable, but the heuristics indicate a malicious intent to redirect users to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/6vq1ooou18l9rdhsopmb29h78f/gawajasu.pdf In PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087778833958---nexagapilevilesepiw.pdfIn PDF document text
    • http://kbchina.de/upload/74186093170.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/jexade.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/6c56ae9fa9a0eeb10eafff59124d92e6/rigizulunanulolodolupu.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/wivaj.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/81836211390.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/30451248729.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/wuvoxafafamujav.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/33555866963.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/366e74ea1b938fba346c83578c9c8572/dulozegebukitepawobivif.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/wobizurimururim.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/6c7d831a3ee6c76bff83b072c268ee86/vatavomekitodoloki.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/58205757666.pdfIn PDF document text
    • http://takeacode.org/user/d41d8cd98f00b204e9800998ecf8427e/file/puvowovipaxegejekabinuzi.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/lobazukatipumevajedap.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/13293004928.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/3363015139.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/wovazizobot.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b3a925f15---pagoruxufawokibobude.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/fivisadeziv.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/40705279178.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tabelle+derivate+e+integrali+pdfPDF 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_off0000d39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 17800 bytes
SHA-256: 05ce70860c01e9eef1ed3d425faed41ddc62087b7caafbe692a992118d23a9a3
font_02_sfnt_off00011ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC8 10556 bytes
SHA-256: 2e5e1310f14d745d9e6b5bcd80ff91d34f008b1e1e23473297fb699190b02644

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