Malicious PDF — malware analysis report

Static analysis result for SHA-256 021db760324d1058…

MALICIOUS

PDF

72.4 KB Created: 2021-09-04 11:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6201eb9ae8af1aec2f66fd1b6e94b5c SHA-1: 67651df2ab19b48e12d1e0272c6eb9dfd035db8e SHA-256: 021db760324d1058620761cd712fe4d1442de31d37f3e9eb575579a0f75b98a2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO manipulation. The presence of numerous links suggests an attempt to distribute malicious content or traffic across multiple domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://summitremodelinginc.com/userfiles/files/96447372457.pdf In PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/klo7v0bl6i942hfg7542ffnqvv/9136921166.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/90542961471.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/kiraburusezugavudofuzute.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/liwobigekurexejesox.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6e4d16d8c---xevajakulamorepus.pdfIn PDF document text
    • https://mszukam.pl/dat//file/roxiriwegujazazobe.pdfIn PDF document text
    • http://agrion.org/upload/fichier/69017966737.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161099f788ac3a---zizenuxatepefekat.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/10818588092.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210702_3AEBEA6D0D2EE1F1.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/b01f4obl0ufmkfnuhkijpu1tjr/76109878355.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/dalarajuruzekaka.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/kivezekemilajivojef.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b6df177f7---nududefunizukile.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084029c626ed---58356968261.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210727131236.pdfIn PDF document text
    • https://sgotomotiv.org/upload/files/kajezozisiwesigevipudufo.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f7e6b4f19---xijajuvibaboromine.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/kidafidugabasafel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gcse+chemistry+edexcel+revision+guide+pdfPDF link annotation
    • https://lapdonline.org/file/xopadisok.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_off0000b734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB734 11328 bytes
SHA-256: 2992fea3edd7a4319f8c22f0ca13c1f68142cf61c6c852ee6770e48120fb80b7
font_01_sfnt_off0000d185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD185 16492 bytes
SHA-256: 4655982274fd5455b9511e0bad5f63910286dbfc36b7ca5d87a4b6ec1567999d
font_02_sfnt_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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