Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2fff10e1f6aa7a…

MALICIOUS

PDF

65.4 KB Created: 2021-10-06 05:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f782d65cea3a39707e05280430877db6 SHA-1: b9f67c811f2165d5b28c4462ad5a74f07ef27a07 SHA-256: 4d2fff10e1f6aa7abd2cff7d55d4a06a164c9ecd366e441bcca8ac09d4045800
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The presence of external URIs and link farms suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5294

Heuristics 5

  • 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 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
  • 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://thuocnam.xyz/images/files/8311825895.pdf In PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/rakupazusesekul.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/50c3b6bb40f9bd83f549fac121d2e164/78837046000.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210910121915.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/94795040088.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/66723789451.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/dadetuginoxuwom.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b798a7646c---71921320657.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/03927a43e67b8d14dc93c51e633b87d9/78552471740.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/29354086659.pdfIn PDF document text
    • https://sausalito.com/wysiwygfiles/file/dekudifakatijidirotokegab.pdfIn PDF document text
    • https://manenshop.com/upload/files/42187985904.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/nifasisijefiduvavilofo.pdfIn PDF document text
    • http://maysoi.com/hinhanh_fckeditor/file/pevinatifukuwevatetoxoma.pdfIn PDF document text
    • https://chptravel.ir/data/file/lidawixuv.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/97715729127.pdfIn PDF document text
    • https://blugarden.eu/file/30026057474.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146660d6f4a9---xupatu.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/30943908870.pdfIn PDF document text
    • http://petra-koparki.pl/Upload/file/32467300773.pdfIn PDF document text
    • https://kcss.hu/korosi/userfiles/file/54538339207.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/57275068223.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614675c56434d---zeripewi.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/foruxuzilu.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210908_061943.pdfIn PDF document text
    • http://officegate.biz/admin/fck_upload/file/mebose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=spotting+the+international+space+stationPDF link annotation
    • 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_off0000b2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F1 14888 bytes
SHA-256: 3742ed3e19621b76b6ad31d27618fa773668f6b57a5336b111a345a0416d63f9
font_01_sfnt_off0000d8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D2 10728 bytes
SHA-256: de074ccdb09266aca8d092db9459fa635db9a3f1db79c7050d7fe06a84d335db
font_02_sfnt_off0000f16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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