Malicious PDF — malware analysis report

Static analysis result for SHA-256 a902f6700ae0ee1f…

MALICIOUS

PDF

115.2 KB Created: 2021-06-12 19:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fc0e1023853dfb5d3cb4955c596c41cf SHA-1: 0ac4780fa01984965562a4f0ec0c7f2f629c4ddf SHA-256: a902f6700ae0ee1fc38dc6e3315cca891c18c2c1c9b4b7995fc54df0a8b2b09d
164 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple URLs, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports this, indicating a lure to download a secondary payload. While no scripts were explicitly extracted, the overall structure and URL patterns are consistent with malicious PDF documents designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://huntic.ru/uplcv?utm_term=ethiopian+grade+9+physics+teacher+guide+pdf PDF link annotation
    • http://angelojrobles.com/admin_initial_test/userfiles/file/76868773718.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/7115802812.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/44617dc304d46dc9456d8026a4c0f017/jumolisixabas.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c66c624626811ca8959f27f65afb262b/94854068272.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b71cb1648---97964664375.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7161270247---81131626537.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/manoduwi.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f038a84059---wenutogokib.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160752d9fc69ad---45195488875.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b27e89c9e0c---tideturenavon.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/81d7e9ff903246ff57f0de23cf1355ff/kumijujaxerusom.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/zejetokozu.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086f2a82d7a8---vigalaziwafil.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/hjk5v5bt7b73gqluui6cl7uoj4/32190949587.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1f27d2df0---razugut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15171 5600 bytes
SHA-256: e1068309098ea754ccc03597520c5aba2dd829d9bec94599be1b1b5b8b354eec
font_01_sfnt_off00016445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16445 8352 bytes
SHA-256: 26b6873ec45f01ceb6af1a31fd39ed5d24d0709b0d83987ede3c4f5aa6a34248
font_02_sfnt_off00017e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E48 12856 bytes
SHA-256: 3fa7c5257db3774dbc916c411f2287d52f40b3e1fb3b00d85b6a98f6a3de0f86
font_03_sfnt_off0001aa07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA07 16148 bytes
SHA-256: ae40886a1a99c34f20f81ce1d1033b8a0c681792af55471a749aafb43dea08d6

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