Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5111530ce3835a…

MALICIOUS

PDF

77.1 KB Created: 2021-09-05 11:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0f7f8bdf1984b411ed34938128685e33 SHA-1: bc1c4f5c2576bc2aadadd290d937e079e3650152 SHA-256: 0f5111530ce3835a87bdfebf1f446f051df69acfcb8f01563bc6c8e99d70cd25
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://xn--e42bt3l.net/upfile/files/xaradebojotomenek.pdf In PDF document text
    • https://grandplaza.bg/uploads/assets/file/jirepogegekefigalarab.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb0793a30d---vapifuxovinis.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/kufowarulivelavadidini.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/78215204571.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210527063248.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/76569506986.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/29627093890.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021062221431834.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/5a99017b7c2cd869b115dc3654d0dfae/57532642281.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/xuruluxodulo.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/8a8e873c8cee59dbee080f4cd4e42649/67201615062.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/gutubezajekemeliwe.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/rumuvoged.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/lexegara.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/92564345514.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/913702ec68d8eddd5ecb8a23256f0e96/85184284667.pdfIn PDF document text
    • http://pi-consulting.ch/download/vabobigadapotirepi.pdfIn PDF document text
    • http://riviera.az/userfiles/file/97055563667.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/i0fg3f9urkhe7qvltaskkt6jps/88977786959.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc092602d4b---5332896448.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/29010489439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=free+attendance+sheet+pdf+2019PDF 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_off0000ca3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 10900 bytes
SHA-256: d545bc9390ea3718d8856a23f89e017dc7ab5264a6699f2acf5dc04636e04c2d
font_02_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 16984 bytes
SHA-256: 102a8e27c6b399b945d7d244c29e2fd1179fd3f581cc78b9f541a6b9d340a843

Open this report in the interactive analyzer, or submit your own file for analysis.