Malicious PDF — malware analysis report

Static analysis result for SHA-256 711bdb883eb38d2c…

MALICIOUS

PDF

82.3 KB Created: 2021-09-16 06:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c0dc1d7ffff57ca380076b544ac2fa1 SHA-1: 822a6f319e08da875d04a73cc9ac9de331ded2b3 SHA-256: 711bdb883eb38d2c15de35798a344e70baea17dd5bd2c22c575151fb7c0833db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and potentially malicious URLs. The presence of embedded URLs and the structure of the document suggest an attempt to trick users into visiting these sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://drafthe.ru/uplcv?utm_term=pok%C3%A9mon+ultra+sun+and+ultra+moon+3ds+rom+download PDF link annotation
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161393366a5df1---78811965739.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1cfb480c7---60593518245.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613edecf8d1f9---99566311693.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090809383047.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/66933115678.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/jabutaxoju.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20210911_005739.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/38308181941.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202109100944162477.pdfIn PDF document text
    • http://sjhtractor.com/d/files/71253840174.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/74587247113.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/60446342001.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/92310234510.pdfIn PDF document text
    • http://sziazsauto.com/uploads/files/17349867708.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/27920688972.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/0a55301712cfa8a54896b656d42258a3/reximofezalotusakupop.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/20796204389.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/fiwukomovaz.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/wojorimaza.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ieb4o3vvieohqn2naebitgn3rl/7388339580.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/51479380642.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131679c86e9f---40482355840.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/dizekuj.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/24081339685.pdfIn PDF document text
    • http://menifee.hanasushichoice.com/uploads/files/85994313791.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_off0000d9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 17892 bytes
SHA-256: 51c24ca3daf6b436b8ffc43871bb4f993a17346613d930f2ca606093e2d2ef66
font_02_sfnt_off00012015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12015 10788 bytes
SHA-256: e43b47509307c69783c4ba3cd6e0c16dc6606237f9525674ed519ce86337facb

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