Malicious PDF — malware analysis report

Static analysis result for SHA-256 899128fc11d4f18f…

MALICIOUS

PDF

96.6 KB Created: 2021-09-01 10:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 209dfd514d312ae75fa02aba9875308a SHA-1: 5e7b7da5e7fe7a6a31a78699fcb4814796e965b2 SHA-256: 899128fc11d4f18f8d7321d9a9cc33135b82217c66b6ec7fad80f2872af4c92e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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=3+letter+bible+names PDF link annotation
    • http://bastola.org/userfiles/file/bugavirizarabefob.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/5636729670.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/fetotibinaxowu.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/matalimesofotekuwim.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/89669279068.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/fenaxi.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/42685755976.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/44930488657.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6781c9cd48---gakusi.pdfIn PDF document text
    • https://datajournonepal.org/files/lupizor.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/37350888085.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e10a2d5c26---kilazuvadeposuvederilo.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1319175279608c149304e3f.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/74755916900.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/8vc3ec879ds9ni0aae5uonho3u/zajuvafojig.pdfIn PDF document text
    • http://branonperformance.com/ckfinder/userfiles/files/58614426455.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf31c1525---63391168590.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/jizipuban.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/edf777f4929ff7bb649bd1c7f475a5a7/31735711727.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608227d5a2ed4---95725388496.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/13653840064.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/mibiga.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a898d03a2---vifotetitulumezizolil.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/70b3a240f21743a56385d6d8da0d418b/48016659187.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_off000110bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CD 20040 bytes
SHA-256: 8eadbae25e1cf54298090363e8537ec154f9e52942b1ef30c39f1154578330d2
font_02_sfnt_off00015c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C4F 10364 bytes
SHA-256: dc57e92d7626d541a6c3e4ce106bd746b104e3628cc892450a571c3de9ffa628

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