Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad2c22e3cc16ee1…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 04:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 091767ae4ae2a4ab50384e241e61a8fd SHA-1: c125cfbb4c48d48c9f99f222210235bc41af51a8 SHA-256: 4ad2c22e3cc16ee1fe5008a09ce8f73318c65029564d9724bc7ed7de86094a7a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm with numerous external URIs, many of which point to unknown or potentially malicious domains, suggesting an attempt to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://domainecomps.com/documents/files/rezatu.pdf In PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/temero.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/tutivafonovukiwibe.pdfIn PDF document text
    • http://dobermanncz.eu/files/nedenoduwujixonoma.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/98709541583.pdfIn PDF document text
    • http://homeopathyhk.com/files/gejazijelizigok.pdfIn PDF document text
    • http://maybaobidinhdinh.com/upload/files/timozatawajipazuxes.pdfIn PDF document text
    • http://stilistspb.online/public/files/uploads/files/loxilowusodomoju.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210902164944.pdfIn PDF document text
    • https://bisleriuber.genefied.co/ckfinder/userfiles/files/52400947260.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/7040319948.pdfIn PDF document text
    • http://daiquangsico.com/img_duhoc/files/remozomifowov.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/pukunawugabiri.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/91118895705.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/bozifasemimoj.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/57822679532.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/jeguvivimedever.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131f15be59f6---wubopeb.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210911file///javuga.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/6768258268.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/gudedalulamaki.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/xaxaramenawufusigegifike.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/28479786087.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/bowopowawibinurud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=disable+touch+screen+on+androidPDF 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_off0000dadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EE 19300 bytes
SHA-256: 4b834636269e0af103f76bd72445c74703e6a31e5830204b2d6a18d82acdf4e6
font_02_sfnt_off000124f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F4 10708 bytes
SHA-256: 1c02b0ca46bb61fc22064fcdcd13ad6066595c42ab347be6fa36d2ed40070439

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