Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd789598b47eef8…

MALICIOUS

PDF

95.7 KB Created: 2021-07-25 18:03:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 97524f955936f2ea5ecd7e6e277284f6 SHA-1: 75076f3efaaf333e70dfa20a6d14e57ca146ab81 SHA-256: 0fd789598b47eef89176ef8bf529c93e0a2f8ea918f3a2e288365ee88fb555f2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classification and ClamAV detection. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075794aaac72---xobelivopamafita.pdf In PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/difitagevoxetikuvimaza.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rcv2vqhtv9rujjeg5skhe1o8b7/pawuragixi.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/rn3c2nefchk5guvrk7b8tan4n2/zaboronifopupajikudejir.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5faa2b0dd---94024056530.pdfIn PDF document text
    • http://7seapharmtech.com/Uploadfiles/files/gulos.pdfIn PDF document text
    • http://unityproductions.com/upload/files/sukumopedegom.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8adcbd58fb11a53a280547c9b1766fa6/komebesatufelawakibolafe.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/94726061008.pdfIn PDF document text
    • http://cuatudongsaigon.net/uploads/files/zemibawigagixivakagolep.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/bc5dd01504f8021c1ed072c42ef0f45b/87402938734.pdfIn PDF document text
    • http://coxfamilyreunions.com/clients/5/56/566bc9ad745482f371977770c3e6b383/File/duzurosopuvewarowivosi.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/fujubase.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/lepupuxukine.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tubedefa.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/82701234580.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/fowuwogipedokoxiwewuji.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160843a3020b2a---37140498969.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16094503a97aaa---62031443961.pdfIn PDF document text
    • http://khanaphatgroup.com/UserFiles/file/zaxelosuzuzewawotofeloto.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/misesibokel.pdfIn PDF document text
    • http://dhf-china.com/d/files/kijoxeferofasojagoximi.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/82140506010.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076bdbd1f62a---gediputogafog.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/coad75q3n6utgjm7b1quqgj192/62651341460.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=free+movies+sites+unblocked+at+schoolPDF 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_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12833 11012 bytes
SHA-256: 3b7b5a5f9790402d66b6d0334c7d6e13759a5bb26e9e3ce6b1c2f4e160d564fb
font_02_sfnt_off0001419e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1419E 17508 bytes
SHA-256: 6a8af4e0ba3f4fe65ab33c08e6be68f69a2a7e4f79257c9a63af6684023de813