Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e4b6c6000ac900…

MALICIOUS

PDF

81.7 KB Created: 2021-08-23 10:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 200ea7074370eec1a2793f48a6baf7fa SHA-1: 179630e76c2361fa8e40a734c421e36504a45002 SHA-256: 63e4b6c6000ac9000cbe01e731a3bb05a4076e8cef7325a5e720df8bbb6b2ac2
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it functions as a link farm to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/8ed2a1f7af8094012cc21f7abeac98c3/58197185035.pdf In PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/kovepowekid.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/vhr7fdbhqnoj45lnv8qgjag0no/dodiferak.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/gepafutoromemunajez.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/18722312198.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/76075205864.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607979908b47a---kiliwiruselatade.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pcncj4j78ocu3ior15blkriuk4/xozono.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db2c51679ee---deregawodofone.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83bdb31eda---50221167150.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/redupataxenurewabenid.pdfIn PDF document text
    • http://derma-dts.de/files/file/71488095620.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/tizajipuxuruwogovedeja.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ad496466ec5b5f1aa6cc82e7b7cc739b/lapewiwexobojane.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/52fd0e1feb7a550911bff364dbc11e6e/kipapurubujujuvolavesox.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210623012502_383141473.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/riratiludonigafif.pdfIn PDF document text
    • http://seamacros.com/upload/file/20280079675.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/69003814346.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f27af6ca50---tamigukaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=removal+of+tonsils+medical+termPDF 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_off0000de00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE00 16600 bytes
SHA-256: 574c17da40802d36813b6da332d756ba874fc29f2386084e8c74941114192796
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 10748 bytes
SHA-256: 2e7a3fc340bfbf5a013002b0f694003151ffae9b24e7c395c96cbc2ca5c04ac3

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