Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58d9946f53753e7…

MALICIOUS

PDF

91.6 KB Created: 2021-08-07 02:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54ad885bef394f81eb2315b5d36be5b3 SHA-1: d04f3dd73c3349f8f7f8dd4edef4032200b25137 SHA-256: e58d9946f53753e718df659843c4711a8ea9e41263a49f6229bfec5cac0a790d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm designed to obscure the true destination, a common tactic for phishing and malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://residenceraffaellotorino.com/userfiles/files/51508639473.pdf In PDF document text
    • http://quatang3t.com/upload/files/pagekirasigi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dda927a9ec8---soxawunirosenapikajud.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/semujupito.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/ca53191ba9b0635764a6a9297cdb8250/xodewusojapakexitagogapan.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/retifiwidugepajum.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1608092eaebf9a---93684597382.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/8d6bafe4522ceb6ef824e54af128a677/fomonoze.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e67ed614c2---2055833570.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/59619e9296908dd053592fb959da4654/34028323731.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/85589826260.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/gekujaguf.pdfIn PDF document text
    • https://redac.ch/upload/88149819204.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/27164682257.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16092a83375d23---xoripirelezojevepi.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a8eb7af8e---bogakururaxadakegenirak.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160d9b8db35ed1---47342379383.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/0f568b86cca3f028e9d44e2fa19c9323/4993302595.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/vurovoferuforigepabe.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b72c09b9477---73313648146.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a606a3dea30c0904888f1b34fed602f6/96003056142.pdfIn PDF document text
    • http://schubert-hh.de/image/file/51321284077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=como+bajar+archivos+de+scribd+sin+pagarPDF 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_off0000fd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 11184 bytes
SHA-256: b5a57f30cab336e2a6d094851108696937f230c59fa80daa20d6b466f04f0f95
font_01_sfnt_off000116da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DA 18408 bytes
SHA-256: a4d24b4d70ec243cc34f2a0f77cc2444cf934f8b66c093492fdbf6963b2d7b79
font_02_sfnt_off000145e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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