Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96c6e7f4c85fb51…

MALICIOUS

PDF

79.4 KB Created: 2021-09-01 07:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f35d3e03e0389019d028f2e03ac347af SHA-1: 3a6c828933d744ff06e00ba87c86fe22d6b8eead SHA-256: c96c6e7f4c85fb512590f43965ac2aeb75d23f5027a19125c165c5b8175fafad
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to various websites. Some of these URLs are hosted on compromised CMS uploads or disposable hosting, indicating a potential distribution point for malicious content or phishing lures. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://velo.hu/UserFiles/file/34822555894.pdf In PDF document text
    • https://frontivo.ro/userfiles/file/momopasaxodijisagepawa.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/sutesogabimefebetefa.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c89f49e1930---zaramutati.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba24b367f8---37015521604.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/safalipewuzagizafojunod.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/47738005647.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/iveskcq8qte9fko1p4pttpsm39/gevodamaraziziwuxalidumo.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6801e95091---24316835858.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/87aee0cb7c39e5c9c23b5ebb9fde863a/37151551426.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f6590390cbecb590cfd734206a4db8d8/82501365120.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/9bd9d770ea8550fd58799125b7fb09d6/deporesexidor.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/4854678377.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084e63c536f8---98937834064.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/78320773347.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/kujimikudizuke.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/gijulasexijafokawo.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161132d31e7029---62872322371.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/lokefulakosole.pdfIn PDF document text
    • http://dirpub.org/editor/ckfinder/userfiles/files/lutururexugukoputuf.pdfIn PDF document text
    • http://waypl.pl/upload/File/mizejifagadevag.pdfIn PDF document text
    • https://castel.ro/userfiles/file/40379027203.pdfIn PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/vizofaniwaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=left+side+sore+to+touchPDF 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_off0000d48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48C 10320 bytes
SHA-256: 8567e405e0d1f426a3bd99ad70df3b8e0411b2f64069421c9718b1346e8ffbd9
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 16556 bytes
SHA-256: 19724a79e3b154b6d03e4309e77b8da58baf1309bba8935ae54b63f0bad63413

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