Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01dc408d0ad9114…

MALICIOUS

PDF

89.6 KB Created: 2021-09-05 22:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9c06cc5a64b4a868a3d5a63821ab00d9 SHA-1: 127bdf23e8ebd59ddb61c321c35cbde0d51195b8 SHA-256: d01dc408d0ad91145d12844f1d3462bbe2d8a8514ff3c648d4dd771e05411a70
176 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised WordPress installations or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/65140198fcd97b41f68680f62907adbe/15035381889.pdf In PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/93430401654.pdfIn PDF document text
    • http://maidichike.com/upload/files/gakuxuvukukumokonupofa.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/202172089158955.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/vugedotosazut.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/xakujakewodiwuvoful.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/73781159623.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/39745443974.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/nasotivi.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/47633995394.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b230b2bf6---zevudotafivalonovegekuf.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/71957807555.pdfIn PDF document text
    • https://dakhoathienhoa.net/images/files/bukiweten.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/rrfjhcqu9bhc5s3m6m64i4d421/jivarakafaj.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/kurasuzemafelirubopipe.pdfIn PDF document text
    • https://dietacud.eu/upload/file/9730461278.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/86341124484.pdfIn PDF document text
    • http://prota.ru/upload/files/nukusewufazobowakenafu.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/47099877908.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/tijokifuwuxobekegeselar.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/vebedujekowum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=la+chambre+des+merveilles+pdf+gratuitPDF 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_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF5 11108 bytes
SHA-256: 8eee504689a41aa429dd64817e33a4291c2cabb4121720f6c27b7858e4f4d167
font_02_sfnt_off0001277b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277B 19844 bytes
SHA-256: 8baede97d3f2d7af2a771a795b68bd4d9a699ba7c731e297731a5cbb28c4f421

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