Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dbaa2d4f663d7e6…

MALICIOUS

PDF

78.0 KB Created: 2021-05-10 02:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef333e023de720f3d400b57597772bf2 SHA-1: 75adbdeae48f7adf38a139944c521675b5ee67ed SHA-256: 8dbaa2d4f663d7e64cc57d4788c700abe4ebc139c4bdf369a728913b42a4b56c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely lead to the download of further malicious content, masquerading as a 'beginner guide'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160725c1015768---67839660989.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/llsva0rhcndbg8avg0r4p7ufr8/95483742724.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/d3223d8b53bc761cfbdc43dec584a2bb/kegewirinefusatid.pdf
    • https://cgeminfos.ma/upload/file/79949130780.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/73epvs81fusmc2g2dq03m9iskf/lujexu.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/0e121c3d36d70b22e75bb6a2b6a32b29/buzaw.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d2e6249245b1abaef3e48911551400f1/viwezikaxijosi.pdf
    • http://bannails.com/fckeditor_userfiles/file/20378614564.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/gp4dan7i2odhcrh5pd4bfafpp5/77501832101.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/dc9212be95c39e55c6aa6a4df576a04e/nuraguj.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/ejefjlgq2u47f2olvgp4o7p9r3/lezolelufurumozipiwoze.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607739aa9c936---68425719621.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5d1bc39d38900db62c3b51bb4e7ce86e/28674508989.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761972398b4---55414992023.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/ec7b96a62fc4efefe0a855cd901fa8ff/40979658684.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16080d73090386---xuzogimap.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16094c695e356e---gefamixirokino.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=heroes+evolved+beginner+guide
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3dc.bin
cf12a25a079748d956bbb77d162213b4492c0c9cbb549c9f273acce22313c3a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 4944 bytes
font_01_sfnt_off000104bd.bin
6c02b2137b55465598914a5e6f4ed2dd08664e4c9815e48de403872a68cd820b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BD 11156 bytes

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