Malicious PDF — malware analysis report

Static analysis result for SHA-256 6596e016f67ab82e…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 16:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 60d4be0127a609e62079b01d12e790de SHA-1: a53871a400f5ca58734d24465c4756d52176fce0 SHA-256: 6596e016f67ab82e44a27176e6521e43d56ef80f39fec2f5fc5f14b04e2c026f
164 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised or disposable domains, indicative of a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the presence of external URIs and the overall structure point towards a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=suggested+answers+of+ca+final+nov+2020 PDF link annotation
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/18374634839.pdfIn PDF document text
    • https://cakkue.com/contents//files/96985427888.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85483e1fef653b5cc7a2b9104689980f/bomesolenosuvapadoxuxotez.pdfIn PDF document text
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/totegeviwutuderotajom.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/93262150291.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ec72626d0---mopiwodun.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/sexalivemotib.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/37195751117.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612caa5a5b0c1---35945370547.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/41549905796.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/55763433631.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/l9idjlcao2g2um15r0gjmuc4qg/43214165564.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-08-27/images/files/fezaxefogofa.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/80205495370.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///98994905102.pdfIn PDF document text
    • http://innotack.com/userfiles/files/lawezoxowozala.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b65f8af47---19684211.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/58879176575.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f450705d7406d909770ee032e942ae3/43628262200.pdfIn PDF document text
    • https://dafelia.com/files/931781886.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160783dcd044d5---59123698253.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/318991909.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/76711113836.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/97511745284.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/75141383064.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80cf2b168---13075995246.pdfIn PDF document text
    • 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_off0000dfe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE4 17912 bytes
SHA-256: 934252014629075924d6c128c542ca1d958370411c2cd9998411e87255a14981
font_01_sfnt_off00010e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 11220 bytes
SHA-256: 4d37447a2f6ec7969f1bac9dbf590e3f89ddd4e2f00241db22f319c44212f786

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