Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb97bed59babdc36…

MALICIOUS

PDF

88.3 KB Created: 2021-07-30 04:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a8d6555b3dfe1f9e810eb5a3b9e07a14 SHA-1: 6b76688138de934491f6bc611b5631bbfcae3805 SHA-256: cb97bed59babdc365070238dca3476245187834f8565215fbcde322f0bd69ce4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple external URIs and compromised CMS upload links suggests an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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
  • 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://an-professional.ru/img/files/file/lazisotagile.pdf In PDF document text
    • https://pui-vital.ro/msg_media/file/fimabada.pdfIn PDF document text
    • http://euroear.eu/ckfinder/userfiles/files/51869685785.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae408c0be5---13926257868.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/pimajakita.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/76d75e4ffa0ddd83ac038679a3e13e0d/tufalivofolusofovodivil.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/83224dbd9f017e459aefd24cd9bd18c8/jadibabujomuxirotokafixej.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lumumofekelapaj.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/e0d6c2292df9e381aba6629b545ef9b0/71843828017.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b976ce2884a---nelefilibevututekijejumu.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/2tutgtqk8euqj2qemg79sri58p/dezozawowigukito.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/nafirivesomene.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/g5ti6aor4q75g21gpv6gij7c01/risevifudabinironubi.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab312395a58---98222385443.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7cd64fb23---wirojoletosul.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/raap2a7jprs0ugqpg62e30mj25/95116203107.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/54155334602.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4bfb3a7ff---wasiwigem.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/tuzeb.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/46502070610.pdfIn PDF document text
    • http://packamate.com/userfiles/jubigaperozekozopivelol.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/92115265998.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c85058c8a---86842882107.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/rulabogemodoxodirewug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=exemples+des+conjonctions+de+subordinationPDF link annotation
    • 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_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 11132 bytes
SHA-256: bb4d40fcaef441a94c4604a7f17158dcc661aa660b4a966813fc30d92b9986f2
font_01_sfnt_off00010a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A22 18684 bytes
SHA-256: cc3aea2f827e8d5d6f092336b60e64b0cb4c2f325f220ef8bcbaf5d4ef7b0a81
font_02_sfnt_off000138fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.