Malicious PDF — malware analysis report

Static analysis result for SHA-256 47814171a25422f7…

MALICIOUS

PDF

89.4 KB Created: 2021-07-13 06:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 937cb6c75d63e6e24aeba69bd355a794 SHA-1: 037b9efb0f29c905af3383a13a089f0b1b09c16e SHA-256: 47814171a25422f75a88463b994ea9117d2290e433e208ac40c030a1aaeaa3ee
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pistant.ru/uplcv?utm_term=tamil+dubbed+movie+download PDF link annotation
    • https://dukra.sk/editor_uploads/files/tudawezavunutiga.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/6da006485aa758bce33f50a9c33fb298/81924708859.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ee9317c1f---jisopet.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/74428251679.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16093d442f396c---dumamaxa.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/j7folmj9st2o9nip1ho70nfaso/xizojititamanifukus.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/46957151243.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/19841825571.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/37169485769.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c2b3ec6c51f0333feab0baa93b8c1a3a/20391764405.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/96507325343.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/99653278189.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/99838706345.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2gc0f8vn90m76qprnjs7gd3knp/64434160198.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b97a552eb5e---77699961261.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/taranedovedikasij.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/861425cedbebc3d3905529a28a37edba/72074103826.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03b7e8fd8a---gegawikizetubabodij.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/53c895af13e26bb64390d6de6d2fa599/93325920982.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/1rcl483uiv87vgrphsod1iqpv6/21114830409.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5956bd3c3---kigonar.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/guxomisumezib.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/vebixaraziwedubimuluk.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/sebonatenig.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/4jpfk22evbk9ia0l2v5b8bvtm7/lukijo.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2653dd048---mumaferuvezikanan.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_off0000fc3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001144d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144D 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
font_02_sfnt_off00014096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14096 10396 bytes
SHA-256: 8b102d261ee13185aec6dc21fd309c7d1d86d0c6d668f1cd120b63d25c525550