Malicious PDF — malware analysis report

Static analysis result for SHA-256 589e6c60db24939f…

MALICIOUS

PDF

77.4 KB Created: 2021-09-16 15:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 67db27e70e9deee6f61159730529e2a0 SHA-1: c9d5c81491f31428b4c1499258c21ec2e83c0d8e SHA-256: 589e6c60db24939f954624a2d285fcc62f6533ba658eecd378b07c6b366f7283
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • 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://smidgel.ru/uplcv?utm_term=friday+night+lights+streaming PDF link annotation
    • http://trongtinpc.com/luutru/files/96716101246.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/48522013556.pdfIn PDF document text
    • http://nineslash.com/user_file/file/66643888459.pdfIn PDF document text
    • https://vpmemorial.net/images/file/faluzexitofesapele.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/33442103563.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/6586550782.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/xikanorisigizajem.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a74e614a17---52258967991.pdfIn PDF document text
    • http://parentini.it/userfiles/files/43318227432.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/15070948828.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/paseki.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/gomuberusexoweri.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/bipazemugoximilofup.pdfIn PDF document text
    • http://xycrusher.com/d/files/27405464571.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/66823362171.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/38141836612.pdfIn PDF document text
    • http://simpelms.nl/userfiles/files/gufabelabepe.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/88245118505.pdfIn PDF document text
    • http://archiw.bibliotekalesmierz.eu/img/upload/files/wipevafowodowifasosusoge.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/49326823747.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/fesunivabewunimobu.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/gumatenuzaxozilinemur.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/43396430852.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/nasakefisujoseji.pdfIn PDF document text
    • http://giftboxvietthuy.com/upload/ck/files/ramoridara.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_off0000cbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAE 10668 bytes
SHA-256: 900545ec013c03d398786cf20fe97e1a91a9af822a214b9589d85516b6b8e07a
font_01_sfnt_off0000e3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A9 16904 bytes
SHA-256: 9cc03eb84498afec70d6cb56e69ba0b24aff5bbacdeb8964a47197b3fdfd95b3
font_02_sfnt_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1