Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9db18ed9001da08…

MALICIOUS

PDF

83.6 KB Created: 2021-09-18 13:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bdf793221359b64d4786b861bab11f7e SHA-1: ad14d24f2bd06341f749f75cd73d7c64a368fc42 SHA-256: b9db18ed9001da08d71d66b95d81b5589cd2ecd57ebeb084ac8a23fd2b1646b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and form a link farm, indicating a phishing or malware distribution attempt. The presence of urgency lures further supports this. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pistant.ru/uplcv?utm_term=android+application+editor+software PDF link annotation
    • http://embody.box8websites.com/ckfinder/userfiles/files/fadivi.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090410570356.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/96768207989.pdfPDF link annotation
    • https://masukpt1.com/contents/files/43965599074.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zivuziwubosasukuv.pdfIn PDF document text
    • http://sdes.in/uploads/65534107538.pdfIn PDF document text
    • https://propage.q-cloud.net/upload/ckeditor/pages/files/kudapox.pdfIn PDF document text
    • http://iuoooo.com/filespath/files/20210905041954.pdfIn PDF document text
    • http://gdgom.com/upload/file/210914092118132131vrhr7skupp19.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/gipadoxubabidaraleka.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/091444436687.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/bewego.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/puxekapo.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/jizebetasezujitexadovojud.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/20800700264.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/svhb2dkm4v1tp3a70d4vlmpt6n/jijujolezufevejexe.pdfIn PDF document text
    • http://wieswioska.pl/userfiles/file/rigebetopam.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/67223609998.pdfIn PDF document text
    • https://hirurgija.me/files/jivolir.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/29161214895.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/fuzegopiwu.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/nujipulagovugufisan.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138b5aa2293e---55543987831.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/75244528565.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_off0000e1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DB 18300 bytes
SHA-256: 78cfd8e25ec3cedacb9f218fbcf871ff4293d44e03a986e799f93a66b15c81b2
font_02_sfnt_off00012897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12897 10680 bytes
SHA-256: 7a08959051b9cfae6d93becafc21543f4c28eb3ef5e227884de79cd64a62dc44