Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cabf306a58feb7c…

MALICIOUS

PDF

77.4 KB Created: 2021-09-22 12:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: da56e23037e7285b46bbb481196a1ac6 SHA-1: f97c8a4bfe867ff3f4e714294de2c91a5235c5a3 SHA-256: 9cabf306a58feb7c468b52f335bc44b5278005fb86bec2feb007b24b31549f0a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of numerous unknown URLs points to a potential redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://arnetbilgisayar.com/upload/ckfinder/files/52577149822.pdf In PDF document text
    • https://profesa.net/userFilesfile/88980160516.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/wopujijugivofutuv.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/52610975740.pdfIn PDF document text
    • https://veaodaibrahma.com/uploads/image/files/36392937903.pdfIn PDF document text
    • https://onecre.com/images/content/files/gelidofesajorozerajigif.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/22400315444.pdfIn PDF document text
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/xenuxanuzajoxif.pdfIn PDF document text
    • http://alkanboya.com/files/file///93769013810.pdfIn PDF document text
    • http://antichigelsi.it/userfiles/files/73839015570.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc44c9c6be---49988270785.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/rugaleguzuzozakuxe.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/dadapivabev.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/lokude.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/sivazuzi.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/zibubinutitamuxezuvobizok.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/ragovuputujomojuwenaf.pdfIn PDF document text
    • https://okazionche.com/files/wivutapajonisabumagusopek.pdfIn PDF document text
    • https://herfection.herfection.tw/upload/ckfinder_temp/files/20210901082914.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/forotubabovidil.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/9746645641.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366fafdb888---40996201656.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/zetife.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/87487232634.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/towakutanin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=sir+francis+drake+lawn+bowlsPDF 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_off0000c9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E3 18008 bytes
SHA-256: 1a2b117dd641ec173c78edc028e88e4582f35caf7a4976c497942865fe7c1376
font_01_sfnt_off0000f767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF767 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7E 10764 bytes
SHA-256: c249aa624178947a3f6e943467a36900a761bb77e94f9e501e060bcec0589ba4