Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede2d214adcd25e9…

MALICIOUS

PDF

96.3 KB Created: 2021-08-13 23:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b223f9897a0a1caac11641c9d6a2dc1 SHA-1: be93280b8fb508e3258d76099d350b03dd8a13ad SHA-256: ede2d214adcd25e9a36057a62bc43cbbbf3896080aabdbe5c37266e5b1d7cb21
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or for SEO manipulation. While no scripts were directly extracted, the nature of the links and the PDF format suggest potential exploitation or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/fd4d40473ca14d293f0d82528177ea14/jarefumexuxama.pdf In PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bca2309eba4---87633749979.pdfIn PDF document text
    • https://lifeteacher.tw/uploads//files/202108112052417746.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16078988ba7f5e---tapafilupi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/258450642.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/xoxamawikapitovew.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161054616f2ccd---71728041407.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/81070303776.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abc265e224e---dojexejofobum.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/tananewomubidune.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/9796438535.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/70005584690.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/24992083642.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c5607eaf6---memipalu.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///sajulelelixed.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/kadine.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/26386810742.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/29386422319.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/rivobevudam.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/59687825445.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/844552c5c795f41fd39910d821feef6b/22516425218.pdfIn PDF document text
    • https://techlan.pl/files/file/lozazotono.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076360e28f33---ruromupajexa.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/vukebujasewabuluzasiv.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/jiwujeragufowurofevuja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ar+verbs+spanish+worksheet+answer+keyPDF 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_off00011445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C5C 10784 bytes
SHA-256: e14b5294680387093b352769f58c38613994a34df32e04ec6c680dc99b0ba874
font_02_sfnt_off0001450b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450B 17396 bytes
SHA-256: 228783c737351b59f5fb23c36f0b7d8b2384b92f2d1724b9aa006a75173a1a50

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