Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8ff9ee48f9107e…

MALICIOUS

PDF

68.3 KB Created: 2021-09-27 01:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f6208098be39b870c19346349fcba47b SHA-1: 498e17cc8d0a94807605f0fb57e4611fc3e392d7 SHA-256: ad8ff9ee48f9107e1bbb1686c7bc04efba90b4cce2855113f9e011b30974a160
176 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-heavy nature and embedded links pointing to external websites. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide clickable elements. The numerous external URLs, including those hosted on compromised CMS platforms, suggest an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=clash+of+clans+hack+apk+private+server
    • https://romalasergroup.com/userfiles/files/vomejosenekapoxuvokizago.pdf
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/98481720757.pdf
    • http://srtprogetti.eu/userfiles/files/vakerimiviwuto.pdf
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/9812118011.pdf
    • http://hladonural.ru/upload_picture/luzuziberorarega.pdf
    • https://pmrmhss.com/userfiles/file/8331924050.pdf
    • https://diagoldjewels.com/userfiles/file/26220276427.pdf
    • https://quangcaowebsite.vn/uploads/files/29632617222.pdf
    • http://menifee.hanasushichoice.com/uploads/files/88408712300.pdf
    • http://positiveforce.in/uploads/files/13790640991.pdf
    • http://universalgroupautos.com/files/others/34973896938.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614939b759387---kuzuxoxifotekosaw.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16141bcfa9bcfb---sosubomotuxorova.pdf
    • http://vanguardhungary.hu/userfiles/file/babegenibivekaletafo.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/wituwivil.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1657ccd42---nonivuv.pdf
    • http://lateonsettay-sachs.org/userfiles/file/kobizivazufudewok.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/vaduweb.pdf
    • http://jagdrevier.hu/upload/images/file/89658493092.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/0021a1322c70e3a01d1e4ee5d2157c41/xisetap.pdf
    • http://vanprodukt.cz/UserFiles/File/8929880684.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/usqdh9eb8d34sh24aer84knjas/buserove.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/v9qpd7slsmlf65i5gvkc5h4qs2/jofogerukevovizogibedix.pdf
    • http://officegate.biz/admin/fck_upload/file/41843810654.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_off0000afdb.bin
b819e5ffb0e2d2ad303cd7955cddb27db5778890748518c1ce9523ec63355af9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDB 10768 bytes
font_01_sfnt_off0000c8a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A6 16792 bytes
font_02_sfnt_off0000e0b8.bin
3d8757a0a7fb2ecb9a653b335fb6b6f35587c461b55bf7a95dd3fd1b2ecfd846
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B8 14112 bytes