Malicious PDF — malware analysis report

Static analysis result for SHA-256 092018521edbb56d…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 15:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a17f890d3d1a494bd12e9da5151e0b7c SHA-1: 9b4e8e29da50508e3c82ad27bdb9b0f354809b0a SHA-256: 092018521edbb56d03e6d44ca58f7ede6c08d80fad49ee52ab91c6f547cd3e34
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a heuristic indicating it's a link farm, suggesting a phishing or malware distribution attempt. The presence of a QR code lure further supports this. ClamAV detection and ML classification confirm the malicious nature of the document, likely serving as a lure to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://oniceh.ru/uplcv?utm_term=qr+code+beyblade+burst+valtryek+v5 PDF link annotation
    • http://prime-standard.com/piceditor/file/diporofozeku.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/kelirukomezebamo.pdfIn PDF document text
    • http://air-ned.com/uploads/files/gizeraxomivufuwulol.pdfIn PDF document text
    • http://mikailang.com/userfiles/file/20210916052329_1678851312.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210913182818.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/josuvezoxavuxudevafa.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/14650950666.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1613535266d765---29735113677.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/15689796741.pdfIn PDF document text
    • https://atiksigorta.com/files/mafunosapen.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd47176508---67163158510.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/32239282973.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/wibosufiratimuwu.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/dedodisatopopulivuputon.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/zurigoponagikimifenon.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/medasuliretaw.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161331c7f119c9---sezibisonod.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/naxebijiw.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9a0597e58---ribamavunumewovosarebilad.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/97376833993.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/bakolo.pdfIn PDF document text
    • https://bbox.ru/images/shared/file/zesipitezusomatagub.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/29eu04i2u54t7ij6i7drp4sebd/motirotaduj.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_off0000da00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA00 17664 bytes
SHA-256: c98570de6278e49c55a7c9670e8405e2a7ed04c4c9d1808c2f569c0193aae36e
font_01_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 10872 bytes
SHA-256: fb167244b0952ca723358877f793d399e38cd97c2dec90402ddf47200e35aaaa
font_02_sfnt_off000121a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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