Malicious PDF — malware analysis report

Static analysis result for SHA-256 b632ec0620601dc8…

MALICIOUS

PDF

71.6 KB Created: 2021-10-01 02:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 90ab1f649eee06af0798011c4045e629 SHA-1: 9479bbe823b115f9f730d0de37c4dee1ed680e2d SHA-256: b632ec0620601dc858efa0dd983ffb6b739cd87e5ca6502df2f29902c0df241a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://archism.ru/uplcv?utm_term=flash+stock+rom+using+odin PDF link annotation
    • http://aydinservis.com/ckfinder/userfiles/files/liperaxurobutezinakunuzo.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/82752776779.pdfIn PDF document text
    • https://hoalavender.net/upload/files/tixukafejunarovijifobuxix.pdfIn PDF document text
    • http://lnaixi.com/userfiles/file/20210919031705_1031431839.pdfIn PDF document text
    • http://elskenecologie.nl/files/51932019607.pdfIn PDF document text
    • http://jor-agric-aqua.com/user_img/files/medusovafotikag.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/65630628908.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150d2b695a47---filuzaxodipobulujem.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/nusizukup.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/najevina.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-08/images/files/lowinamejefokarumu.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/gosoxoxubexovokokaxepasal.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/14a18dcfbfeef5cedf312aabcca989e0/joxazaxixana.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139840e38826---82383644872.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/idigs24622bj4cu7ascb8t1iaq/povejewori.pdfIn PDF document text
    • https://vitanov.rs/files/bijumedexinufisoramo.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/nitetazadonakinomonozewa.pdfIn PDF document text
    • http://mtkshop.com/images/uploads/file/vuturogopelifijepokoxusu.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/mesusufelogix.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/dijup.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/vojevebonuzaruxexi.pdfIn PDF document text
    • https://lasanisports.com/files/kuwedoxob.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/4652708210.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/30489860516.pdfIn PDF document text
    • http://leeandrewdavison.com/download/50606290987.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_off0000b5ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EE 16364 bytes
SHA-256: f6d506d7fde374c86c43050f1526f69bfca6f450a1115179462d093d1528cef4
font_01_sfnt_off0000e003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE003 10856 bytes
SHA-256: 5bae8342ddaf5dbcf825ceea1b20fd0f1298a528d8142d8a9eeaa514733e13cf
font_02_sfnt_off0000f8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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