Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f13e61956f3497…

MALICIOUS

PDF

80.8 KB Created: 2021-09-22 21:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f1946460fdd9d6154e4fc0aa3e17a35 SHA-1: 6d1978d01e328f34c57418af734c767b06179f89 SHA-256: 03f13e61956f3497c41ae19744fe4efc40a074fa1996820732c5d97dc33e9b78
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of urgency lures in the document body further supports a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tulokodoselumuzoluman.pdf
    • http://pc75.net/upfiles/file/1631846598.pdf
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/77224936586.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ce8b09dba112aaeb32e4179716fe3e18/72226816187.pdf
    • https://radekslodkiewicz.pl/files/file/85240208458.pdf
    • https://matricula.arendic.cl/files/bimetasaxiwebesukek.pdf
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144f4266ea0e---bopaxarunasewaxesata.pdf
    • https://madame-tina.com/ckfinder/userfiles/files/44823350703.pdf
    • https://kingdomofgodmn.org/userfiles/files/xiwulomuzifalujumol.pdf
    • http://mega.kz/media/upload/files/40312507899.pdf
    • http://hyunshin.net/userfiles/file/39397557912.pdf
    • http://agriturismoilnoceto.com/userfiles/files/2716842839.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/928748a95f4a9961d4afe95797e79bd2/vogitofulegutowutivin.pdf
    • http://topp.pl/_topp/file/83826642529.pdf
    • http://hmondo.com/userData/board/file/99129697986.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614877b33ddad---botefutufubajunov.pdf
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/11504256790.pdf
    • http://kepco-group.com/uploaded_files/userfiles/files/93751853225.pdf
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/sulunukataxiler.pdf
    • http://imoroz.by/upload/file/47145535465.pdf
    • https://skvacations.com/userfiles/file/46685073944.pdf
    • http://svatba-emi.com/uploads/pages/files/32605052360.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+do+i+use+my+firestick+without+the+remote
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d497.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 16792 bytes
font_01_sfnt_off0000eca9.bin
df2d9c765bc0dd27d572986c37ae2c18b77a79f64ff0abca4b9368c16d91b13b
pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 18428 bytes
font_02_sfnt_off00011ca8.bin
59fd41469a5936e35780c0109c2014bf2bcbb39a419bf1f563bea25ec0d527a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA8 10812 bytes