Malicious PDF — malware analysis report

Static analysis result for SHA-256 952c882c0e1bcb93…

MALICIOUS

PDF

83.1 KB Created: 2021-10-16 13:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 041b059d7ec86d74dd433d494104173c SHA-1: f3e4d920d7be98f845c7f3cf32153226f6eaaf61 SHA-256: 952c882c0e1bcb934f624a662194a50f4fdf3fed73aa4cbd0f44fbc8dfb03758
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://eatoceanic.iorderfoods.com/uploads/files/lokonelujuvugidenilaziw.pdf In PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/tukubetaxufogebim.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/kapudobirikutalevexuji.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/detujebenunagodalekoba.pdfIn PDF document text
    • http://hitechdentalhouston.com/uploads/files/darug.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/xezusuwusewameniji.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/57039190312.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/78922225151.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/kavatidotot.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1615dc289a4d44---43851092221.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/vijatu.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///20219981126549.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/58330636100.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161313357edbbe---bojid.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/dekuwobovaxizoxuzopome.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/77911034762.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3aae4731e---jowen.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021101319463812.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/84955030596.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/47165767233.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/77354743077.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HTGXzuRVGb4/uplcv?utm_term=how+to+breed+pandas+in+minecraft+pocket+editionPDF 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_off0000db8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 18680 bytes
SHA-256: 7a24c3321dbe915209954c318d504b3849786cee83957cf6116c708367f062fb
font_02_sfnt_off000124fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FD 11044 bytes
SHA-256: b0b9f269d09b949694715503ba5da1a98594af347688a53a822736f7750b0a2b