Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a5c1314e84a097…

MALICIOUS

PDF

72.6 KB Created: 2021-09-07 08:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d5e6973b2cc32dce1c50bf3d00d0e6a5 SHA-1: ca6250f1a43e6446fcd72a3fda66943afdb1a36a SHA-256: c9a5c1314e84a0970f96f6b4f6329c4849ec89336fdb4b8a4b46a0ccf11f02da
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the redirection to these malicious sites. The primary goal appears to be directing users to external content, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://ngor2-3.com/file_media/file_image/file/95009629710.pdf In PDF document text
    • http://jiangsutravel.kr/userfiles/files/20210615_191913.pdfIn PDF document text
    • http://samurairamenbar.com/uploads/files/jipajotamo.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/6flaa4430q4v6pf8lhr3pc2gp3/xitevelar.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/kexulubixamabadipofu.pdfIn PDF document text
    • http://naucseto.cz/storage/38054285195.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ff9f03a422e3a86486a67e736c9c41bf/71361496724.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6896063c56c2a9ddc43cfc76d91502b7/47380354997.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/29603722141.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/2661646159.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/v4is8va0i96g0s6ncj73bqfc86/fulupevujovobopabegiz.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100e3293e71d---vumovajazasuvof.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/08c21890aa464d57937961719c191b7d/zakabelobobuviwe.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/27144900145.pdfIn PDF document text
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/84106250767.pdfIn PDF document text
    • https://samudra99.com/contents//files/lupixomegikidagipu.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/56530934432.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/af46828328c5f0c8d8180317d28819e7/23593873260.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/saretapejogupadasumilo.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/80684082291.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021080302325073499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=treatment+rheumatoid+arthritis+pdfPDF 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_off0000ba98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA98 16300 bytes
SHA-256: ff0708d1a2c18bdba51f6387e359376d03aa423316bda1a7a17c8cd87adb3512
font_01_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 10780 bytes
SHA-256: 0ff40a8531cef4c71561b8a373603b3d17e4cdcae0d7d7edb9f7bef3a746b793
font_02_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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