Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c220525189b91d…

MALICIOUS

PDF

99.2 KB Created: 2021-09-01 10:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e22c75cbd12d354432da18a112b38a7 SHA-1: 3252020089136ce218fa370d4a9d3e560b82759f SHA-256: d8c220525189b91d83660bbed7283c41cee9dfe14aae061516a3ed5e26f25418
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=tori+and+beck+dating+in+real+life PDF link annotation
    • http://thucancakoihikari.com/luutru/files/wumesimamedifixaw.pdfIn PDF document text
    • http://vanharteyoga.nl/uploads/files/55578764230.pdfIn PDF document text
    • http://ipost.mn/ckfinder/userfiles/files/sewebuxubexebomanaxuf.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca25cd8e8d---2613012040.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/ruwenipalawuxagolisarab.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/rt06ousvc28oh0eual8eks78pk/59408974978.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d178a89e9d---33382034230.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc9a6b8fc8---59753328083.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/268e8a238d1dc6360e96239c86bb7d9b/93306749638.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/redejonekedeginubakopimu.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161219707c3e86---26479571483.pdfIn PDF document text
    • https://led7.ru/file/58447442076.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b21b2726b7b---musofovit.pdfIn PDF document text
    • http://orthodoxnews.us/file/nugigiso.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb550b972aa---47627520020.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d867b47ca29---42278111419.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/af6e99ac86c513304071c9f416a7ac70/tixetemotujumudataj.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/97656851381.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/4127b24b57a7f3b179d381f29dfa9d74/pebazofugozagositup.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809ab50102a---84833490401.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/16f0d7c2f816b98f1fb18f7a5fdd42b7/kojobidoj.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/27406355903.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_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 20392 bytes
SHA-256: 19bb2bd9e285684dad3c34ea4ba0783bef2c48f39a6d4f5b735a4a4ef46a0562
font_01_sfnt_off00014eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB5 10676 bytes
SHA-256: c39365e63f8245271d1c66fd1ce651b36a2fbbe49c28c01796d437d9544a723f
font_02_sfnt_off00016711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16711 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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