Malicious PDF — malware analysis report

Static analysis result for SHA-256 309c0169ac198044…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 01:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1ba01635ca6cf72c512e4c3e0fb5a782 SHA-1: 95cef1d5af5930e2e59d6ac036a35547aa21556a SHA-256: 309c0169ac19804444ec042181dc647090db0ba9b2dac608a783fec3d902bc93
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the link farm structure is a common tactic for initial access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://krisoc.ru/uplcv?utm_term=tax+deduction+for+charitable+donations PDF link annotation
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3b24612c13c0055857891456e0d8851c/lunedibagujokevigu.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/zesikakijegolatura.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/69657493885.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/vebixadefopomurizig.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79a0f30e3b---25313909978.pdfIn PDF document text
    • https://simon-daulte.com/ckfinder/userfiles/files/rezelow.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16071be183a94d---51219228139.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/o2b8m7atelvqlm7b9aeb7ngg7c/padiwiridelurus.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/tolizixaziwivu.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a635954ee1c---logiwakotarufu.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/tenofevuted.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/33913354801.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/ruputomuseretivijojaxur.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/ee303c02ebb899e98e3ec8795893f421/20835279850.pdfIn PDF document text
    • https://tonycustomtailoring.com/nbloom/fckuploads/file/favizebiloz.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88d932b6e---86893501619.pdfIn PDF document text
    • https://lecachet.fr/docs/files/36914655526.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611731cab8093---misudat.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/puxox.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/86815496106.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/jaxoletubilo.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160805e98ab489---66500976056.pdfIn PDF document text
    • http://schokofontaenen.de/idata/rofemitibujume.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_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DC 17724 bytes
SHA-256: 617c1e6d8a3fff1d6c2ed59725fe8a7407cddc9e47f20015d1dfa1a58db858c5
font_02_sfnt_off0001269e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269E 10876 bytes
SHA-256: 83c263047cb0f403e13e723033658c32b452d0f768b2d9724b7b30a44fe2d5fe

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