Malicious PDF — malware analysis report

Static analysis result for SHA-256 201cd549646372e7…

MALICIOUS

PDF

85.3 KB Created: 2021-09-18 03:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 86e4fb381daeda0a26219a19c49c9b0d SHA-1: 043b4363f09dbdb458d4d49e777f0853302bf2a6 SHA-256: 201cd549646372e7111697f327b4b63a9a30487847bc68590018ca6bb7ca931d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to disposable domains and are structured as link farms, a common tactic for distributing malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URI patterns suggest it's designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=best+gaming+fonts+for+thumbnails PDF link annotation
    • https://bold-iot.com/uploads/files/202109051904506930.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/gukilizebazovevotute.pdfIn PDF document text
    • https://learn-atdi.com/uploads/files/wasalobawilalafitevuxofi.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/62237404318.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314d3c7cb3c---94579643242.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/26676599213.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/warebuzikivimafe.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/90112637457.pdfIn PDF document text
    • http://safedoorsystems.com/cmsimages/file/32009556905.pdfIn PDF document text
    • https://bushregenerators.com/userfiles/files/puvasiluvus.pdfIn PDF document text
    • http://sibmaxi.ru/userfiles/file/41620800945.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/89246566377.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/jedosiwizudawiwefo.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210913164229_NDgxNzY5MTA4MTU=.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/89781681653.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/jokaborimozadako.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/tixozomexesa.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/32386001883.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/37617468736.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/53326302072.pdfPDF link annotation
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/toleribazezosifovejox.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/gazebuma.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/18adff9c1c773b858cb7492a007ee34e/nanugo.pdfIn PDF document text
    • 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_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 17884 bytes
SHA-256: 132b5a6ec28aa9d343913c190f65f3ccc10ce7619c9972a1960debbd5cf96624
font_01_sfnt_off0001165d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E74 10956 bytes
SHA-256: ac94f29f03e15d2e144c794d56b3bf9622a4ae3de46ba2a7eb93fc4c86ae249d