Malicious PDF — malware analysis report

Static analysis result for SHA-256 96253888efe184ca…

MALICIOUS

PDF

84.2 KB Created: 2021-09-13 16:34:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8f2247b5986bdbfa64ab4c2145a6b177 SHA-1: 5ba9a57fac3dce74561c56f65320f43cd8139e52 SHA-256: 96253888efe184ca2798d34c848332163b5c113d98ead971ae1174999752ad29
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external PDF files, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to direct users to malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs users to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/uplcv?utm_term=adjust+lock+screen+time+android PDF link annotation
    • https://citronixdeflection.com/nbloom/fckuploads/file/42225345271.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/mofutomopodudosisuvo.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/dafokefogomivekideba.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/67269176935.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/getonutolomiwapitoxino.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/22844301778.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376fd84a4e1---retatewatebov.pdfIn PDF document text
    • https://sanruouvang.net/images/uploaded/file/barukirowub.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/2255208631.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/kawunomakikesezunopidip.pdfIn PDF document text
    • http://benetworkingpro.com/ckfinder/userfiles/files/jerixabodusipafinugixipe.pdfIn PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/29356371094.pdfIn PDF document text
    • http://sloplast.com/userfiles/files/tupuz.pdfIn PDF document text
    • https://vinaarc.com/app/webroot/files/ckfinder/userfiles/files/jezibonagakabo.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0590e0f01f6b3e7eb254431a71430f25/sowifobitopebanoregagozo.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/nibiwupenusapeditav.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/vekup.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/pasapijow.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d3af26aca9769a5adaa98888da34a454/fisarakakute.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/vemerukipudukapujil.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613f463010874---53555845878.pdfIn PDF document text
    • https://southernwashpros.com/nbloom/fckuploads/file/80246118400.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/93929431628.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135534e97608---2102903651.pdfIn PDF document text
    • http://mizuho-co.net/file/ck/files/92295265971.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/gakoratapoletuxoxot.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_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 16896 bytes
SHA-256: eede5b1ab4672b842ffef93b909fbb7207948d702c768f3d99265c676909d788
font_01_sfnt_off000111bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D2 10836 bytes
SHA-256: 0d085927116e27f6c4e41fe8adb8050bdc3c26923c2b414be9da2eb129ea1c26

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