Malicious PDF — malware analysis report

Static analysis result for SHA-256 932b3fa19e7b76c7…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 05:14:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9b2b41a7f0d163e21b80de76fc876cf5 SHA-1: a762aa29afc0ada9421a04b03a2b5598ea93ecbb SHA-256: 932b3fa19e7b76c7d85911caa9da810b4fbc7c977c379fe22889e873fc44e9c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure point towards an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://garglob.ru/uplcv?utm_term=voter+id+list+up+pdf PDF link annotation
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089176fdb07e---timabuxaputenolizigibad.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/19e17f0ffc0b04e750bff8003cec611a/mijarirokamurid.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/24150008217.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/62062974503.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/1c29a007d6e4c612d8c7eb4ff18470cb/guvosasonurawaxelezep.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/5a7096bf24c87a694620039c178eea5e/visubawejupexodetulumuz.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/56082687921.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1610e7d01ac2af---tever.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/58266589226.pdfIn PDF document text
    • http://bjjiffy.com/upload/91302759735.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7050e2575a2ee869ce3781a3407bed39/23587478173.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f2e18b552c37c5db2727f517a0fd9d35/bifarunorozevowe.pdfIn PDF document text
    • http://caogenzhiben.com/filespath/files/20210819115017.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607198e22ecd0---38876825333.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087bb4dba6f2---jelazaperafudiba.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/18535297969.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/20273480139.pdfIn PDF document text
    • http://wych123.com/upload/files/79395696345.pdfIn PDF document text
    • https://aokman-drive.com/d/files/76050170107.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab7a902aeb---wifexinuravolasagobuzewo.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/fomezikuwal.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b268221b74---winopapuvetuzesol.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b5fa3fc1---30802862389.pdfIn PDF document text
    • http://ideviceplus.nl/app/webroot/files/userfiles/files/52993179608.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16102ec25a7bfc---69058957807.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/tibakirewolor.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_off0000d683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD683 17904 bytes
SHA-256: 68ee29ce337500c049b0812650b4c5e7e49a1633ff77c1d0f21e024029a9c11b
font_01_sfnt_off0001047e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047E 10296 bytes
SHA-256: e2b3467aef4b514d2cf80aa47f0778552262a1a92bc40fcd47c85859b1584a0c
font_02_sfnt_off00011bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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