Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a34870f55bc832…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 13:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 291481f22a475235bdcad4d60b01a545 SHA-1: 116389cb2c1be06d2c4a27abac4c14804ea5db8c SHA-256: 09a34870f55bc8321b4b7fd5de2847f82711204372b165e7600b9e89791635bb
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to direct users to external content, consistent with phishing or malware distribution tactics. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=vice+city+cheats+codes+pc+pdf PDF link annotation
    • http://voijin.com/userfiles/files/57403460174.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/e4a878e8213b23e3568cc57bf8ca8826/lowavelujutuna.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/40694629929.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/zukado.pdfIn PDF document text
    • https://psihodesk.ro/ckfinder/userfiles/files/93533487091.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/sugozabu.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/muziwunitijodafuvabes.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/27372818780.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/71900314600.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9f8e5204fd2485ae4e0e6490ce5ac0c/silepujevigamifakukowitud.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/f726220f75d2dca772a6b67a5295b99b/wonidatavolewivajuvit.pdfIn PDF document text
    • http://wenxuezj.com/images/File/32785770539.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a9314c50---54280213392.pdfIn PDF document text
    • http://proclima-membranes.ru/userfiles/file/dibugagesija.pdfIn PDF document text
    • https://movie2book.com/userfiles/file/zodudefijawufapovefo.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e43a9ba10---sedutegujanigok.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/d8l7kglun59rb86d3fgah8q4td/52514340672.pdfIn PDF document text
    • https://southafricapools.com/contents//files/42219175543.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/2938efb3d666c687b210d69b3e40b2f1/98593746775.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d5597e47673---mebukubalimatanosax.pdfIn PDF document text
    • https://actor-conseil.com/files/file/14111434817.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/5oibnpmpub5vdoepa98a60c05s/barixabefenemududaze.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/76678329798.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/lagevizeferaniguxutenoxe.pdfIn PDF document text
    • http://clarkstownhs64.com/clients/2/25/255c49a504cbad61718694d8b78dfcdd/File/20252119293.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/6168945738.pdfIn PDF document text
    • https://hyosung-gulf.com/uploads/file/tiluwek.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_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 17524 bytes
SHA-256: 2db6f3e0287ea56b2ef75791e610f91df4c1eb106b40735f7922c39f67c1c831
font_02_sfnt_off000125f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F7 10548 bytes
SHA-256: 8afe8a83699798d8a12b63f07a083bdbec542668e537e0df09c1e90f980606c1

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