Malicious PDF — malware analysis report

Static analysis result for SHA-256 be65be1fcb60162a…

MALICIOUS

PDF

90.4 KB Created: 2021-07-23 11:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8e431427d42b77a5ceb8f09b7c422667 SHA-1: 49765dfe6b8bf6022131586d148900264b85a248 SHA-256: be65be1fcb60162a4994a51dcdf78d861db28a5e8cab8036bd4f4e5d13ebc833
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. This suggests a phishing or redirection scheme designed to lead users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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://hookmyweddingup.net/clients/73542/File/89124716114.pdf In PDF document text
    • https://adasms.fr/userfiles/file/37787795616.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9c99fa02ab163f53cb30d107038a4fa9/kuvelutojimomalabam.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/32016131245.pdfIn PDF document text
    • https://rm-parketi.si/uploads/bepogasukebo.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/gerilanaruxeminekoleribu.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc90ede21---89836969586.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/25h6aoqtgd5anf7pofug4ftto4/misirujikotisujexaninunur.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6e61352a0---27124461463.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/44531457191.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/o2u6srg8cn77vngi0dhtjfu6h6/ludodinupud.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/99794674177.pdfIn PDF document text
    • https://retta-bg.com/userfiles/58007685784.pdfIn PDF document text
    • http://novichiha.ru/pic/file/55851461052.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/90625008896.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/10208122098.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/gabigela.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e904d490466---63469129763.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071d456cc5fd---foxorejumozuzivub.pdfIn PDF document text
    • https://derfo.info/resimler/files/10796945419.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f55417a038---wilufukubatewusivelip.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/65362373805.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=the+subcultures+reader+pdfPDF 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_off0000fe0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0E 17648 bytes
SHA-256: f4bdcfec5e7157adf0d58f9c273586e0d717cc6175c1378b9f7aaa169e8d606e
font_01_sfnt_off00012bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14411 10604 bytes
SHA-256: ee2f99e9405fad091257a616bb29991b068182be742b2c6bcf3ac4ebcf46e94c

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