Malicious PDF — malware analysis report

Static analysis result for SHA-256 2130b9674ee39423…

MALICIOUS

PDF

89.0 KB Created: 2021-08-06 22:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b5dbba3e6020aeec25f37e7ff6cdc55e SHA-1: ff6095330152dfaafed892d9ad0d928fd034a190 SHA-256: 2130b9674ee39423971d98e4a5f31fe5bf706a1d162bfb1c699e3875c35ec71f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9795

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 https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160892c9b0518d---rizubotirore.pdf In PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849801c6bee---xurax.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb4d064ef---37469298708.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a7dce245b---titodoma.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/nogidibaf.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/65200649928.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/79089985311.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a319e4ef6728d6921013f33cd39f81d3/65634404491.pdfIn PDF document text
    • http://faradbox.pl/files/file/pitapiravokike.pdfIn PDF document text
    • http://thaide.org/userfiles/file/43525221204.pdfIn PDF document text
    • http://watsonwilliamsreunion.com/clients/82103/File/savawotebixotasewon.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b82ca0c84---goludubus.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/38059825326.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b421cfca1---46719064548.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-1/20210501005912140897.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/mafokebufukovumafuwuxava.pdfIn PDF document text
    • https://x-software.cz/data/file/99606957914.pdfIn PDF document text
    • https://sentinels.ro/userfiles/file/tusokivijeka.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a2700bc2bc1---fawusosogu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072758b25fd3---xuvepujej.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/86557393538.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0c70f2dc2ed0409eaa80b2d45823134b/bopojuxomomuk.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/kojejosejiw.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/60253851110.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/f01e3da9a5f135acad50c4a5926e9c92/zojovopeduz.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/varanewexezuf.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/kureremofawezojinazuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=starmaker+vip+mod+apk+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 2044 bytes
SHA-256: 9ff0be215eda4510cc1b192ab1b3482226358aa5dcf0ff2a485682e2549b9830
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC6 10812 bytes
SHA-256: 705031c953fe81fad711d4e8a2bb7e82d46a99b040ad905b0e8d950dbc55ce19
font_03_sfnt_off000127b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B8 17604 bytes
SHA-256: 243df551be656e71efe0ea6d2f51f3718918c9352c60125dfaadb3660958c5bd

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