Malicious PDF — malware analysis report

Static analysis result for SHA-256 d018384f8d147f73…

MALICIOUS

PDF

78.1 KB Created: 2021-09-23 02:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9516f319dab7a51ab32dc1b9c81391d8 SHA-1: c08cd562b17a4772f6b2e719b9beb6a6135921b0 SHA-256: d018384f8d147f73bcb7d330025e256ea8380c4d8c6c10003eabaaec7273baeb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous external URIs pointing to various domains, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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 http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/52174591794.pdf In PDF document text
    • https://simpangkanan.com/contents/files/zexuvurekorokovo.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614482f1f081c---miluzofobanurilep.pdfIn PDF document text
    • http://cmtsport.com/pliki/56551005282.pdfIn PDF document text
    • http://kyea.org/imageuploads/87048360318.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/10398259947.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/sadujanel.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/30584497615.pdfIn PDF document text
    • https://lux-ride.com/home/u4-6pzgszajsb5u/www/lux-ride.com/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/jorekuromepatalulonojal.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/8228608547.pdfIn PDF document text
    • https://botroul.be/uploads/12913978819.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/35434352299.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/97331003222.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/92463718859.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/mufatotemotulo.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/42267488435.pdfIn PDF document text
    • https://minhgianggroup.vn/upload/files/45312369445.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/nidagoduzitowedan.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/lizowipubugatobizel.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/jegerebogubir.pdfIn PDF document text
    • http://khlongtoei-nfe.com/library/userfiles/file/filavi.pdfIn PDF document text
    • https://kasihpaham.com/contents/files/91070500964.pdfIn PDF document text
    • http://mvpbuilding.com/userfiles/file/gujofixip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=merge+cute+petPDF 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_off0000cdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 17860 bytes
SHA-256: e09be5436027e305bdcff44fd4e2219a2a7c93f36efd4abe8f6bb9a6219886fa
font_02_sfnt_off000114b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 9952 bytes
SHA-256: 5057c004efbc4a9d931d5a2d90e83aaf94f83230852db57bf012aedf163a06ec

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