Malicious PDF — malware analysis report

Static analysis result for SHA-256 5003413df85d2866…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 01:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 767edf954537574c0bd308fef4a410a4 SHA-1: e39e9430afe041afa7481bb2755d8180092c840f SHA-256: 5003413df85d2866ee2ec3e9159edf304141f2265120e1d6acfebc647e0fa6a5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing pages or download further malware. The presence of multiple compromised CMS upload links suggests a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/89d9bea2f90d91ff7c9488a8cefb690d/gejesarunelamedeku.pdf In PDF document text
    • https://oumkua.com/userfiles/file/68045699118.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/t6nuolvo333narsj9jti9nk511/nirukuwivabekunefisevufe.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff260b353---vidigokezuxu.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/41c32f23742592a54cde27448b65fe38/72839524282.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/28244766625.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/ziseligak.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/67306205223.pdfIn PDF document text
    • https://tipresentoio.it/images/file/golorujikusoror.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/gejonomalowomatupozavoril.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/8eea1aa9896c4e6392f7e2be7d130906/52285069593.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/9fupj9dduu3i05t8vf253k1kuf/53145604171.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/4442472894.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/simisexupemerujodufuro.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210715182547_1052653858.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210717_9767CA3101A9FEAE.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/31743137930.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/37294676817.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/03b4b161f440c827ecfd26a33e615def/98441552381.pdfIn PDF document text
    • http://royalgroup.at/tmp/kofiwolijupewofiva.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0787f7bc3a4f50b117f4899170d09faf/54824293088.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/wikezo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=ielts+academic+reading+exercises+pdfPDF 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_off0000b0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B9 10896 bytes
SHA-256: d31c77eb2f13b10694ffbba215e311780c1bbd3c78c59419c2005f3a50102a37
font_02_sfnt_off0000e1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B5 16880 bytes
SHA-256: 6fa187ab516b2b9dd629937fc9b12381061edbb69bc95da79c446fa66d46bfdd

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