Malicious PDF — malware analysis report

Static analysis result for SHA-256 0387be7afce4af56…

MALICIOUS

PDF

83.3 KB Created: 2021-09-15 17:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 62129cb8008f54a5085c86aa3b4bed50 SHA-1: e8b9ca555a7d905d35be666ebabe3521188897a5 SHA-256: 0387be7afce4af5632fa2260f50fdfc7254b9a691b1d486d7c2de0b2880d4b78
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, with high confidence. It contains an embedded JavaScript stream, indicating it is likely attempting to exploit vulnerabilities or perform malicious actions. The presence of numerous disposable links and a 'download button' lure suggests a phishing or scam campaign aimed at tricking users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://muzeumkonstancina.pl/attachments/file/53135760468.pdf In PDF document text
    • https://gallerylingard.com/uploads/file/58805005741.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/dozexewikowugez.pdfIn PDF document text
    • https://thegmsbihta.in/userfiles/file/tufozofujodivatapi.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134d06de8219---87936601347.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/04/38219169870.pdfIn PDF document text
    • https://iqrainternationalschool.org/_assets/files/nuzozuzadobofanitorubuza.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/tojokimenofaje.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/katejeponodemuviwidorulo.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/pofedogugugisosevabibe.pdfIn PDF document text
    • http://uslugi-ogrodnicze.pl/pliki/File/45182636464.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/52809548348.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/forotoxasavog.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/10872626898.pdfIn PDF document text
    • http://tweedehandswikkelaar.nl/app/webroot/files/userfiles/files/73289595947.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/73487823891.pdfIn PDF document text
    • https://martas.vodrsport.cz/uploads/files/vefejon.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/93692111033.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/nanojikev.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/57581385140.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/56880363636.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/wapojikerutog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=watch+bollywood+movies+online+download+2020PDF 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_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F6 11176 bytes
SHA-256: a9fbdd24c30606635235d084ebce96a2bc6c7e8ed32953c584c579e634594235
font_02_sfnt_off00011006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11006 18236 bytes
SHA-256: 56db852c286136f7586723282b6c31eeb7aad5f6b6c2078d37449936630a9ab9