Malicious PDF — malware analysis report

Static analysis result for SHA-256 7035219068b8b953…

MALICIOUS

PDF

84.2 KB Created: 2021-09-11 21:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4786954ed36181279fb89d2821a6bb8e SHA-1: d041e209356a4ffabeea754d2d0cb1c1ccaaad08 SHA-256: 7035219068b8b9539f36f46d3304f5f2cb67a451e03602a12473726bdedfbf36
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and a significant number of external links, many pointing to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=quadratic+formula+from+graph
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/9772761591.pdf
    • https://infotechb2blite.com/bot/ckfinder/uf/files/73020479408.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59851887898.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/6f6f0e0fd2a9bcc28c8307804b25f6c0/47943551704.pdf
    • https://mamadona.ru/ckfinder/userfiles/files/38483655183.pdf
    • https://nacionalequipamentos.com/ckeditor/uploads/files/75267131271.pdf
    • http://e-baze.lv/images/site/file/jupepolebutezisa.pdf
    • http://mgocsm.in/userfiles/file/82815521807.pdf
    • http://mayepnuocmia.vn/data/ckfinder/files/74661369938.pdf
    • http://vngo-cc.vn/cooker/public/files/kibitapepuvodudezaditu.pdf
    • http://ty-universe.com/image/files/20210908_015924.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16130b6b7981b5---lilalet.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613254df6fe91---59716537613.pdf
    • http://sjhtractor.com/d/files/75103479298.pdf
    • http://vector-luczak.pl/new/fck_user_files/file/suxapenizugaxebulufag.pdf
    • http://vector-food.com/userfiles/file/56480502820.pdf
    • http://fiumevivo.it/userfiles/files/womaperilajozimototadakos.pdf
    • http://bettynblue.com/upload/fck_img/20210906/file/61403592845.pdf
    • https://barcelona-health.com/files/galeria/files/zibosakasitemejapijage.pdf
    • https://resonanceacteurs.nl/userfiles/file/bagizumenuxo.pdf
    • https://kcss.hu/korosi/userfiles/file/48336039791.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/b7004826e7feb6a5e0f8c5037bb57018/69648005055.pdf
    • https://skinrepublic.vn/webroot/img/files/leserawupogiledufenawo.pdf
    • https://tinnituskozpont.hu/files/57353437831.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a1.bin
06b138bea0075fa6ef425cec2ae508cd1e72a7a152a49a673da57394b0cb7cdd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 10820 bytes
font_01_sfnt_off0000fc6f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 16792 bytes
font_02_sfnt_off00011481.bin
bf5373bdc1e1dc7b92edcf9ded482bb1d45cd30a47aa353870466c342de1474a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11481 17840 bytes