Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03c63ec452469cd…

MALICIOUS

PDF

91.5 KB Created: 2021-08-10 05:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac394a52a0838f07787ffca3b9756037 SHA-1: d116389b8b8463672c7abdb3a1f8ade8dded2ece SHA-256: a03c63ec452469cd99d5642b094f6a8ab751f9eb37abfc636abb7984109c39ab
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites and disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' confirms the use of compromised upload storage. The embedded JavaScript likely facilitates the execution of malicious code or redirection to further stages, contributing to a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • 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://garage-fuji.jp/js/upload/files/tobimudokubutaletaboferu.pdf In PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59f3ae5533---kepisibojebilifezejasiv.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/banalugomi.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/jilapij.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ea954be48---zatosibagalosonajo.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/99418687761.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd6dca5d2a---10440686324.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/49585036864.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/delenaziwej.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/wedafomomupadezoruketab.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a3b204c50---60384036801.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/37051701903.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/61163617543.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/6633437025.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/9re1bv4j0ui7dgl0ih9nn7du2b/bemupuwazukafusilewa.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/6be13da5ef08c0aaa8dfe30cd9bd1ef8/99623871233.pdfIn PDF document text
    • http://duoctruongxuan.vn/userfiles/image/file/jolotag.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d137eb3f8c885fa29678b61868b5cc01/rizaredufapegodobutiwot.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/wizuramopu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d1ebcf43d---93905733158.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160773a031d1a6---nivibavug.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/sonerujiralalifemavofo.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/33413745c17384e62d86eaaaddc17ef5/notuvumefom.pdfIn PDF document text
    • http://texmet.pl/userimages/file/6411063682.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160af67a3a3509---xamikajibopazaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=vocabulary+words+for+grade+2+with+meaning+pdfPDF 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_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001166f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166F 17540 bytes
SHA-256: 635af8dfbd01a39c75f93e082cd7ad0090fdd364c1822dc9f22070eb4f72c618
font_02_sfnt_off00014498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14498 11596 bytes
SHA-256: e50dad4e9a4f10137630807de31ad8b42cd910c8ac74875c935cb7011eed7fa6

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