Malicious PDF — malware analysis report

Static analysis result for SHA-256 368e515e5fe7d19a…

MALICIOUS

PDF

127.4 KB Created: 2021-07-22 22:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 66a0e975c7e24a5c129e0f23978cf74c SHA-1: d5bbce2ad8177b3364b0769a91765fc19751c3ec SHA-256: 368e515e5fe7d19aea9f9ce3411e6e78be3aa69eeb16b334390b76fe3e279967
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms. These links likely serve as redirects for phishing attempts or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/32fa54f8b0995a2d35b25f360227e437/vigezajofumegovivilolurap.pdf In PDF document text
    • http://horizonpestservices.com/userfile/54487353862.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/gilotilere.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/21980143987.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/82545963559.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210720163658.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722db57c920---sobevofexilunarepinunanab.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/93449346019.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/sejakiwexufufalebupimeja.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/17a4b4b4ff085b639116e898a5df6887/84836524382.pdfIn PDF document text
    • http://jtylek.pl/Upload/file/99372036630.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6fc4fd44cf---numivifopofanududifebez.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a1beace00c6---zopafewanevit.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/56666010341.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/a7b80e4aade3f6c7ab0cf867a5193df8/98120453726.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f6ef47b2e---bunaxorujavumedomemar.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160766c4c728ab---goganadiwube.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=march+15+ides+of+marchPDF 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_off00017ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000194fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194FD 10672 bytes
SHA-256: 7e519cc06c1c9a2e7a007955b971a75ba9e5fa395994ff225b8a1403c92df5a7
font_02_sfnt_off0001ad89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD89 20856 bytes
SHA-256: cc006fa8390227e751aaf2cb208c56213a82a2ecbec27898154299c34851d15b
font_03_sfnt_off0001e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E15E 3760 bytes
SHA-256: 837b909e6e8e13e9a03e5d2d706697e7072f77c885f8d48dc5514ca7217f7451