Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63a9cc5628927de…

MALICIOUS

PDF

86.0 KB Created: 2021-08-20 06:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0f200148a2203268c55bbbebfc79df2d SHA-1: ed4f02ad1ff6d8b07213c58abb4d792015d0203d SHA-256: c63a9cc5628927defccea3c1baaec9d52d3e79e1a48de238bee9d4e9ea22fb3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8250

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
  • 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
  • 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://galerie-louise.be/userfiles/files/29368809435.pdf In PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/1fe3c9b3503609d4951fd728aea44fc1/11973524988.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/081256509188.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094dceb9eb1b---giwolutirekiwamorituzekep.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/87598cf8ec8be7afc35d4428de5956f0/6024002819.pdfIn PDF document text
    • https://club-sports.net/uploads/products/files/jogebagonojapofaroviful.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/73127938677.pdfIn PDF document text
    • http://take114.kr/FileData/ckfinder/files/20210706_831DD380286D32AE.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/bbdebf0310a25344ad3dac6e2ba03f11/juluvepaxeje.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/97c6c5eadb59979db57875a73f602f7b/kivevemezakulimorewa.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/be21a037846507a7459dca875aeb44d5/nabejor.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/ut4fb52o3f4jti97kd7ohinja0/60976194868.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af44c6e75a0---71412453870.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/geganuwosiboraliri.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c2229e8c26b---53277023081.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7c54df1ed22f7c2860f531d5fa685965/xabuwozawogewabezeki.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/5682351209.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbc9a46868---velazexejeludedonamesit.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/rusosafubevuwofobibotafoj.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/pewozamobo.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/mituranabegimil.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/tidozebon.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092872ee846c---gupozigosanaroz.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/fee664uhhcmkemhnge0th55el0/3783748265.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=toplumsal+e%C4%9Fitim+kurumu+nedirPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001197e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197E 20056 bytes
SHA-256: c5f008529c52eb709f733592795b1aef22ebaef520f42612d276f01c842e03c5