Malicious PDF — malware analysis report

Static analysis result for SHA-256 9618de7e0f385991…

MALICIOUS

PDF

82.4 KB Created: 2021-09-14 09:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d8a5361a174f4b07fe20b025f237ab7 SHA-1: 7aeadb89965474edefdebb97b74e8cdb5b44aefc SHA-256: 9618de7e0f38599162904e58f87e83f17ce4142c446de759023c33a6f5c833f5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.004 Disable or Modify Tools

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_SECURITY_BYPASS' strongly suggests the document's purpose is to prompt the user to disable security software, a common tactic in phishing or malware delivery. While no scripts were directly extracted, the presence of numerous URLs, some pointing to compromised CMS uploads and link farms, indicates a potential distribution or redirection mechanism. The document body was unreadable, preventing a more specific analysis of its lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe7e523fdb---jozejinov.pdf In PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/86779597170.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/wuvafogilubi.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/ladevo.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161312fd83c21e---ranewopemewawaka.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/morigituromelifawa.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/zatenoxemo.pdfIn PDF document text
    • https://www.traitagri-solutions-alternatives.fr/ckfinder/userfiles/files/64892232616.pdfIn PDF document text
    • http://prosquash.by/data/bewavipetowobigopo.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/sotekajeguwasipajekadofu.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/bujeroranagativikoditulun.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394e0128466---10226077226.pdfIn PDF document text
    • https://gtnet-engine.com/ckfinder/userfiles/files/46393711475.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/sulobavexenibowe.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/81678127357.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/rojazosufarusebipasu.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/tofurofofek.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/74556317507.pdfIn PDF document text
    • https://lapakunited.com/contents/files/20412633226.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/36812131979.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/sutimefibosetinatuw.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/wefuxexa.pdfIn PDF document text
    • https://gregoryshow.ru/files/file/ruzotavux.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/josajizebidal.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/fuponapanarawusovale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=windows+10+pro+iso+64+bit+with+crack+full+versionPDF 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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 17200 bytes
SHA-256: 05db32dffd1d581cefa98e7eabd3a8d1b116bfa311de633d36aba5a6c8807a89
font_01_sfnt_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 11616 bytes
SHA-256: 5da3ba9162ce98095a712420286d732d55f9ea383cddb9c6274351d138b10f2d

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