Malicious PDF — malware analysis report

Static analysis result for SHA-256 2565fd6c8dfc59d5…

MALICIOUS

PDF

85.1 KB Created: 2021-09-02 01:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f9441a2012b7c1e545ab0b3853307ef1 SHA-1: 871926326abdf073b775508c9249379a7c3db12b SHA-256: 2565fd6c8dfc59d5f07d0b4b9c7f3ce108abccc531e08d0d21a5763538ed49e0
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/2e1826a59d825fa88095da2e05b71fa8/25446152173.pdf In PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/d9db6941dc17df68435714b8764161f1/83104815008.pdfIn PDF document text
    • http://dgjst.com/upfile/file/lurupivuxidasasi.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/58826129314.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/5f768d609129391e139f3373802ba2e5/72477813279.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/lemikap.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/68016033844.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1608f96318bbdf---wojipagujiju.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/e01667e24ae2e7cca41b56f4973b735d/tufikativuwo.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/28320398606.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/99900980908.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/67961660021.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7acd366993---85221020110.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/didilexixudivirimozolobe.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/pl3rahdmq2m55jfugroncp8a77/boxutizuwoko.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/gifitodawusu.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082c4a96bc04---26404797514.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210519070541.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/80258886559.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/18848485435.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ebu9qo572e9ourllijj25s5is4/natiwufosuledisupi.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072546b5d9a5---23927825627.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/933f8e364929df5f4abcd31542bc6138/vinerukiwez.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/berexurowi.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/82c15c54cbd74bd7ff835db599df3430/58009904771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=john+bible+quiz+questions+and+answers+in+tamilPDF 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_off0000e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE291 19204 bytes
SHA-256: ba1d86bc4d6f559eba120a38f7f6f69522646fad85550d985e4dc686d78a2db3
font_01_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB8 11036 bytes
SHA-256: 1e195152d9ac6e77b2450ec313127f53d407f5851c61137fb10c137ad3976fcd