Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc270ae6448f54f9…

MALICIOUS

PDF

82.7 KB Created: 2021-06-25 14:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 480a752163c032f9ff06b11d67e8fb6f SHA-1: 4717a99f888208ce7bab4f57084fa333696c8ca4 SHA-256: fc270ae6448f54f96614fb4aeb698d7b0261465eb114e3450f0c350f7d32ab53
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malicious content delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baf80ac63f7---dumozenotubamutapozo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b630ed53fe8---wivuxulagovebakov.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4b0810a1---14500855924.pdf
    • http://gotween.com/userfiles/file///32509925898.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a6543775760---41172158510.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea04293cb0---rakilupufufobifaxobimew.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160705bd9d3867---85068300090.pdf
    • http://kapli74.ru/upload_picture/79724196616.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdb35e1e1---junakonekapisobum.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/686b59e75f36f7ac73b1973c69fc5138/gomoseromema.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1ss6ll95dsnhehcv639c8b0c7n/sewuwokofefuzisikafimew.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ad1283be5---puzogodobuzojep.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/bd6fdd345105c0e27d5589a5257aff10/lefakide.pdf
    • http://clarasonic.com/upload/file/23779926187.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/oss7r3t9jmdbonvkqblvbffn60/88213257499.pdf
    • https://cahayaapi1.com/contents//files/lijanunetox.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8b6470139e70933465a3ebfc0258c193/peramiruzifapapepevevan.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882345ddc1c---zisokogezus.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=eye+floaters+at+30
    • 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_off0000e2b0.bin
5ada92903b471f7fcb6c3d276fe3c7ff1252cb2b77fc069ce4bdf7e0f79cd9f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 10404 bytes
font_01_sfnt_off0000fa7b.bin
1548b89388248f6b119d306966badece3ded4715c18099657506be0c3e6bff09
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7B 16848 bytes
font_02_sfnt_off0001266a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 16792 bytes