Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0ec4517c8bea7f…

MALICIOUS

PDF

84.6 KB Created: 2021-08-11 13:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bdff8c8a969c15a70b759712561c90da SHA-1: 9cb21d15c1fd163319cd8b9c3ffa03a02b8bd8f0 SHA-256: dc0ec4517c8bea7f0d1196532938520cff06cc3124a1e324e87cc3e308a071c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are identified as link farms on disposable hosting or compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL findings are sufficient to infer a malicious link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8543

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 http://agarimo.com/archivos/archivos/lixanulibezidoriwawuk.pdf In PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/rodul.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/zeworivigekorego.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/wemifiwexevadebisi.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160829b62a9d25---fuvuruzeseridabezifad.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/roxopuxanon.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///dozaxekopi.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160986eda3af80---luxuvobezarenofudez.pdfIn PDF document text
    • http://universalestetic.com/userfiles/file/zuxeponomixuvekozewiro.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/42253232947.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c43448cf2f9---55954216558.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/92044866101.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a5f417b0ed836936d950446359911988/70006063316.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/74606595331.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/xajubenavawevefotugak.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/vekofapetum.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a8f0c3757bb58b385e006f36281a359b/61853007424.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/newozexanaripari.pdfIn PDF document text
    • http://cmtsport.com/pliki/makoto.pdfIn PDF document text
    • http://splogservice.ru/content/file/buromorixaxenik.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/xonisupejele.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/96745941504.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd451120aa---64152987640.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/09e0cd6afb8d04ac8dc713b3085e17dc/4685752981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+clone+specific+folder+from+bitbucket+repositoryPDF link annotation
    • 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_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BA 11140 bytes
SHA-256: 4cb1545ee998c55b8819b603203c6285f8fc8f40f4a7b52bdfaa519cdedb5b58
font_02_sfnt_off00012186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12186 17188 bytes
SHA-256: b7f0438ac01ee5e087ad97029a4418ce8c9b925058b1c1faf1bed66a074dcb2e