Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c259c52534092a…

MALICIOUS

PDF

77.3 KB Created: 2021-09-17 11:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9853b5688c97d829ed85a0436dfd9674 SHA-1: bcfb90d87d144dc8807917989a7e516f032a995e SHA-256: 93c259c52534092ae40104c3eac3ad6084c57095cfe6e0e5c756f291fdaf32b9
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm with numerous external URIs, suggesting a phishing or SEO abuse campaign. The document body was unreadable, but the presence of many links points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://landpas.pl/upload/file/natimapijegiwem.pdf In PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/13179123488.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/27314883799.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/59856403576.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/towoxuwigoxejunexe.pdfIn PDF document text
    • http://0975811252cool.linker.tw/files/24816662354.pdfIn PDF document text
    • http://195exim.com/datas/files/59783726287.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/77674415784.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/98905569950.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/kafefokolezira.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/40901524692.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/19696722369.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/xidiz.pdfIn PDF document text
    • http://cutyoursupport.com/userfiles/file/tujebanakepenezizego.pdfIn PDF document text
    • https://peoplehelppeople.net/uploads/File/40919455682.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/rurowobixezo.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/zusulitevivurubakivoxon.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/wokilovepajatuzipepuvonox.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/wigupememegivetileditik.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/80668559045.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/demomamutaxufideliwolumot.pdfIn PDF document text
    • https://sieuthigo.vn/upload/ck/files/vuxefixewozoxewox.pdfIn PDF document text
    • https://maths-pdf.fr/ckfinder/userfiles/files/vutidepuzanulov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=parking+mania+1+mod+apkPDF 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_off0000c2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10436 bytes
SHA-256: 69fe60e3dc837bc64d6f84f0dd024bbb60fdd02abf25b4b4d9550c6d292165ea
font_02_sfnt_off0000f214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF214 20512 bytes
SHA-256: 9f09169ab89af46617281e4056b2dba6191d3d92d1f0dff3922fc6d0b2e9a368

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