Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e528f1fc01567e…

MALICIOUS

PDF

73.8 KB Created: 2021-07-09 02:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d64698e474994c132b51528012a819a2 SHA-1: 5a8a3cb3f2f127032e5039ace7452a3b1eef8a8a SHA-256: 28e528f1fc01567efe9962f9c47d213c56c8f926f484caf8a18705a739322352
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript indicates the potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/6a3e90al7n6vsp0n64npshqugk/61308113276.pdf
    • http://olgapolyakova.com/files/files/97876424627.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae9882a4b0---demefabefik.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/90f35a8f26bf2364819f724a87318dad/mawivabeveregawaji.pdf
    • http://naucseto.cz/storage/bamisokomatagavoj.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tul17osfac9keiatfm0rh5u07l/6606048043.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0be57abad3---94512068233.pdf
    • http://poolprotektor.com/userfiles/file/vugabirekovadutobesezimam.pdf
    • http://teyadegitimvideo.com/calisma2/files/uploads/89415241983.pdf
    • http://tantos.jp/js/upload/files/tonaxupisewimuwafasaj.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6552b52de6---14132091460.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3fb311c4fff1fbf97ae3ec33e70e8408/21087531722.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab688cb06ab---10789519694.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1db6ccdec---nipukulajebuvada.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/c83ab5135cc4c63fa34ae1976f03de02/20273454585.pdf
    • http://ukrainski-rosyjski.pl/userfiles/file/buxoseni.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1d107f0acc85bc89e310f19ad6fad742/34032076915.pdf
    • https://hoakhanh.vn/uploads/image/files/12978257086.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925682a4e5f---99870748608.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/nup80p6iov4liad12fonhjbq71/9668360375.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/0853cfbd288f9bebec90ddace6d336b7/dobujezakinot.pdf
    • http://classicalgardenfountains.com/uplds/file/ketivu.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7215ec7d6dd6c8a304494339ce849580/fugaxuv.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/40628a62fddf8a12e7692980ae0286e7/mivofeledelubali.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=coco+before+chanel+full+movie+online+free
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be91.bin
95609d47d4b2980d0993d5f7d88e7897588373c5d01afd73e7a48aa94efafe9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE91 10672 bytes
font_01_sfnt_off0000d6ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CE 16792 bytes
font_02_sfnt_off0000eee0.bin
7792e8f28458ff9b40de503e449f4847fa6ca0e07ad650b470ea82fcedba7caf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 16476 bytes