Malicious PDF — malware analysis report

Static analysis result for SHA-256 127563b22f841bf3…

MALICIOUS

PDF

77.8 KB Created: 2021-09-03 21:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b85f35d7daf7a6afce48ca2962f3e997 SHA-1: 6740a94ca95f2bc9aff645c0a59ab54111efe1f6 SHA-256: 127563b22f841bf30f9f40e59cb1573cf2e2a9a86245a6996de07ade79473a46
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URIs and the nature of the links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/c851c1abf08bbf093c696e1c411970d9/pazojagobosuzodejifo.pdf In PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/kuvipudaxifisalitekigozed.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/retasenakexevupikudokexu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/d4feaf50087bfef570151efba718c81b/xegafapudarotolidot.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/xodokitadanafom.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c2213cc3e---3820454597.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160830fc8785df---magupobugujireb.pdfIn PDF document text
    • http://airmon.hu/images/files/mugaxabinonazojajatu.pdfIn PDF document text
    • https://tivicom.vn/upload/files/7941559096.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5f69491bf---13013351138.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/fewiseda.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070a458896bc---41941020630.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e4ba749e4---jidurezoluwujaworup.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/zofitolokizelu.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/46440316277.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/59132419151.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/cvvv6ogrshenkp1pg6rcsd00o2/fixiruginatoperufubaxuxej.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/3514028435.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bcf9ab60f---sumalenal.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eff1a66714f---36275228688.pdfPDF link annotation
    • http://nktrading.qa/file/files/29578864761.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/43030573463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=family+therapy+goldenberg+9th+edition+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_off0000ca42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 11176 bytes
SHA-256: 78a63f515b30d7714d52b519573456d822caa398b2dbceb6d0baa7497c9cb0aa
font_01_sfnt_off0000e3bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 17500 bytes
SHA-256: c8b4c61a90c4602f13f5af31d6c50b3b613ffc091b0b8a4d9d6672ad8d81fba3