Malicious PDF — malware analysis report

Static analysis result for SHA-256 004ced9d09c20a6d…

MALICIOUS

PDF

92.1 KB Created: 2021-06-30 00:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 081b10aa4e816cd10386b8109360fa77 SHA-1: 82fbbb7c9a42bcf32c601874a75103092afd86bf SHA-256: 004ced9d09c20a6d28dcc8606a0d70c9b469981acef8a417ae34e0d0f87f1dd8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to lure users to malicious content. The primary attack pattern involves exploiting user trust through a seemingly legitimate document to redirect them to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b54cf94bdc3---wutuvedilesojalamibatov.pdf In PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b5dd0a5de---79761575289.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3f805b27---58773385019.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/visigadadoxipip.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a96644a7abc---9666657219.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/70211003092.pdfIn PDF document text
    • https://coonvalleycc.com/userfiles/file/sixoposekakutofamela.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gubavonogeb.pdfIn PDF document text
    • http://langmypham.com/luutru/files/93164597690.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e3eee0703---50338315689.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/omic1jd91kie6fe5b2a508p3sd/64596791533.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077eaf609e96---91368803702.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/tetifafisosakisevufarax.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5b997b03c69d06932b44834a69430d3/sutavurijepa.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/39152319820.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/90740dfe06480559f353e7e5e1e8473a/nuxorimekonifi.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/h5j5bboirf6f56olsitvmfu4n7/9491288910.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/lokuv.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/uigbtnpa0u4ek1q4un1r5thjkd/37309775534.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/zanojumetal.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/paranitib.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/guzugidosopinujikegaxiko.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/12306989899.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72f4190f82---39831542207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=good+multiplayer+phone+gamesPDF 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_off0001048d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048D 11092 bytes
SHA-256: 9a8677efbdb3b916cce67c452c0dfa065c6f24e7ac8c7e9ce3edf91647435faf
font_01_sfnt_off00011e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E07 17360 bytes
SHA-256: 20200a7c28b0567eba562a2afc5a174d0cb94a20729319554bc90396272642e1
font_02_sfnt_off00014b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B30 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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