Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca95f73084af91a…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 16:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a52575243e30451beabb772a4660a14b SHA-1: 1a5b9f217fe7262cd10712433c8815e8b438003f SHA-256: 2ca95f73084af91af3538a85ffcef08cf538ce6a2075eb64420ba2cf0a782a45
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, several of which point to compromised CMS uploads or disposable hosting, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ms01bet.com/contents/files/gaxim.pdf In PDF document text
    • http://myphamasia.net/upload/files/niwope.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/29483646848.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/58783354736.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309636e8feb---14881334780.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/58510605466.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/59283469603.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/dolevejimu.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/zokaneganitafekalupeget.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613825b0233fb---52620037079.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/dabopafefu.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///29436406637.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d488f201c3---pozakijidi.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/79915622448.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/fasuboxapagodubofunekas.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/c8391fe4cb687292ebc7a0efb49a7f4e/51107794853.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/tokoxetedizolowal.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdd7eccb9e---45522727483.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/161327d5f894ed---sanikepupov.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/bitixikipasog.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/61973731375.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/muzumolomolumakimunodoge.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=free+fire+game+download+for+android+highly+compressedPDF 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_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 18324 bytes
SHA-256: 637c7c712c0bc23c09387cff85da1841f6e9a9a77da80171c672509ba845aa15
font_01_sfnt_off000113af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 11148 bytes
SHA-256: 1eb70e3f43f27d56a02703d066259fb04866a798f387bfd4dddcc61f1e28dcda

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