Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1154c3e5b9bd65e…

MALICIOUS

PDF

89.3 KB Created: 2021-09-09 04:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ed6289df379f91cded447aa817850c24 SHA-1: df69cb0a9e0a3d838f73d2af8c0c267acf998c4b SHA-256: c1154c3e5b9bd65e39184013df389b43c23bdeb25a1c7b1f36bc020bcb64767b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://wastran.ru/uplcv?utm_term=hoga+toga+photo+editor+app PDF link annotation
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/jefagubafatekugujidoz.pdfIn PDF document text
    • https://moolans.com/uploads/files/romaxak.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/fasoxox.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/29153911970.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/79539838386.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132c580551a6---87197825044.pdfIn PDF document text
    • http://gdfsztal.com/uploadfile/files/takunaxabimogabipi.pdfIn PDF document text
    • http://studiomanzella.com/userfiles/files/33189884317.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/161309290eb305---25482530462.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d5a2840a6---36365078274.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/tazabetojanudinafol.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/66146694661.pdfIn PDF document text
    • http://minhtoangalaxyhotel.vn/app/webroot/files/ckfinder/files/56040743818.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/lawopidop.pdfIn PDF document text
    • http://xn--80aadcnaeutgftohcogh8i8dsc.xn--p1ai/pict/file/53460406151.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393fa7747f1---80226477282.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/6765786266.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/19930760187.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/luzamexilidilefom.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/fonetofejanoridinipoxi.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/wuzomaxeke.pdfIn PDF document text
    • http://regmac.net/userfiles/files/xodar.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/18875941085.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/4587557921.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/juwipopepomezadopexe.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_off0000f971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF971 10344 bytes
SHA-256: 17c2dba009dd417ea75432a17510388a22a3b81286ad022e739f8416ee6d7c71
font_01_sfnt_off000110ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BD 18068 bytes
SHA-256: 9519346128d26c84e17913b8baf358a6fe186256e81374de30d108a0c6fe3dc4

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