Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b2e7a15b200331…

MALICIOUS

PDF

70.7 KB Created: 2021-09-24 13:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fa650edf3124896102856a5e4ace61be SHA-1: 1c5a1e677b8df0d2bd3f87186a828963fb9da6ca SHA-256: 14b2e7a15b200331282be37a84c7a60439ab8a30e1c46bd5c03edec33e46bbab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9771

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 https://wastran.ru/uplcv?utm_term=how+to+log+out+hotmail+in+windows+10 PDF link annotation
    • https://aurorabersinar2.com/contents/files/96131495451.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/gexoruvupolevemukifufi.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/disivamomuvenif.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/sigifuvoparike.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/zukikexobup.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/tiwifewogubetexinamib.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/80708232841.pdfIn PDF document text
    • http://a-pluset.com/userfiles/fosobamutusevulobedixi.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/19511385430.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/vudiwi.pdfIn PDF document text
    • https://dptech.vn/uploads/files/77786324319.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/75166014342.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/luzus.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/jofavokijeva.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/4020813749.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/8503985524.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/41561331136.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210918121528.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/fulajaxemexev.pdfIn PDF document text
    • http://nakloboucku.cz/uploaded/file/lukokunibezazep.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/22871342437.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/24557760886.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/40954130866.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/66095114463.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/73861715995.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/jogibimatepigut.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://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_off0000b2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FE 17620 bytes
SHA-256: 68c3deb0b1d28c42462f13d53c3f7aa4d7086d869ea7d2b9486146359866955e
font_01_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 10816 bytes
SHA-256: 99abda496398efaeda1bca2f1ea5fb5ae22044c563c3a2900d475f7863ca7a30
font_02_sfnt_off0000f7ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.