Malicious PDF — malware analysis report

Static analysis result for SHA-256 282a48987f05b029…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 00:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ec0a2bf4083085bfd7adb65fdd648527 SHA-1: 4ee0c92bac784e8bd112f2349963bfff000c4889 SHA-256: 282a48987f05b0291b6cd05fbd4f42ffc3a808b258ce9951a158d9b425be5d87
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://go-pxl.com/uploads/files/39107496417.pdf In PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/digowavezikatevuwomoxase.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/7ad28b1413bbbd4e75042885e232e0dd/22269455781.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/safinukozagurikuxuwe.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/latek.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/79950811145.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/zemumidekorezeduteb.pdfIn PDF document text
    • https://anninhsieuthi.online/upload/files/55348772881.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ca20cee7b---68629368432.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/95790979509.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/60978966679.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-20/20210720042356165897.pdfIn PDF document text
    • http://dentherapia.hu/files/file/bewodupexifuwafipo.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/97735230505.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/64200545689.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/pididevizanivedadabo.pdfIn PDF document text
    • http://namjapizza.com/app/webroot/files/10690535271.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0a9b784d7---bonesapunuritowuso.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ff75257ce---63825293970.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609aea0d18575---jikiloxateteniru.pdfIn PDF document text
    • https://tkquiz.com/userfiles/file/kuzewes.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/juwedebukago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=god+is+answerPDF 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_off0000e486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE486 17880 bytes
SHA-256: 915099d4a4105a4d52e121646b64b4e239870486240e5b6403f23c083edb205b
font_01_sfnt_off000112be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BE 10224 bytes
SHA-256: f407f80279baa5b7c75301180ae448efcdd324f0d6ea7d8d64e49308d4559cc5
font_02_sfnt_off000129e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1