Malicious PDF — malware analysis report

Static analysis result for SHA-256 e125577b39c0c0e8…

MALICIOUS

PDF

88.5 KB Created: 2021-09-22 15:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 36148db7eeff1dfb5f96f622fa50cb60 SHA-1: fbac60c83435bf6ab6479dea2e5763e4e9e260b2 SHA-256: e125577b39c0c0e89e7fd5e7a9fc48ce1131e9e8de6d669956ad60b08f8ffe36
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to lure users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The presence of urgency and download button lures further supports this, although no scripts were extracted to detail specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 8

  • 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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://hanleyresources.com/images/kajonodusi.pdf In PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/49852443330.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f006cf27b4---zisipubewevosepilesawiz.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/96245205204.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/67490382301.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/52516026999.pdfIn PDF document text
    • http://thienanglass.vn/upload/files/gufaxodedefonaz.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/53952199642.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/18663852678.pdfIn PDF document text
    • http://jaqalsports.com/files/file/sibotumokesu.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/56919135277.pdfIn PDF document text
    • http://mlead.net/images/e/file/29474385290.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/kuxabopisexotejubi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa01b8b9aa---vevutuse.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/zosotojakomubewu.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/pedipiwizikijusidi.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b91ce0b19e---pejozowiludibafu.pdfIn PDF document text
    • http://wmsone.com/eimages/file/potegejosubik.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/manujanuxeluwutovakiz.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/lipirolefigekibufatafaler.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/1034004485.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9673749afb3c64b8fd4614613a074a75/zuwarakabetoweduduwizeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mod+apk+of+amazon+prime+videoPDF 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_off0000f498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF498 18308 bytes
SHA-256: 8aec6a1d5adc13df665bfce801a16894cd1ad9e990605295708ccd0b7646e36f
font_01_sfnt_off00012419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12419 10560 bytes
SHA-256: 4ea906123ea4489187becefb2f2c1eb25367d00b426c933c60e9b583d0c5f984
font_02_sfnt_off00013c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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