Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1fc80a52a3d22f…

MALICIOUS

PDF

76.8 KB Created: 2021-03-04 03:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2530531d1e14c1e9cd1a11fb39fc36f0 SHA-1: 3eeba5fa272a12fce9cb4ec10f216d5187a48ba6 SHA-256: ba1fc80a52a3d22f96be97f64f6f56ee0e3d7e8eac1e0dc097ba4a146dc1144e
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/wix?keyword=ti+nspire+touchpad+manual PDF link annotation
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/7761635.pdfIn PDF document text
    • https://punizino.weebly.com/uploads/1/3/4/3/134327780/fobogikagew.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/c48c1c.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/jhtkxvz/nefebutokolibukido.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/hiusjef/6650933321.pdfIn PDF document text
    • https://jolezutixuzusav.weebly.com/uploads/1/3/4/6/134605000/nusuwavojuwopum.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/tukeniwabipipa_xularik_xojokagoniruw.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/jejevadiwobu.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/ehgjcs7/police_helicopter_pilot_3d.pdfIn PDF document text
    • https://cdn.sqhk.co/tupipitijil/Xf8Y5ig/icing_cake_bakery_stratford_ct.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/geometric_sequence_worksheets_doc.pdfIn PDF document text
    • http://namidonom.epizy.com/wugovuzuzoturotodozofi.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/xavilum.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/gmail_create_account_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/40382836629.pdfIn PDF document text
    • http://zozusanom.epizy.com/vuzirogowetitutetapuku.pdfIn PDF document text
    • http://dumudolaba.epizy.com/dilation_activity_sheet_answers.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://scripts.sil.org/OFLIn 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_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 5144 bytes
SHA-256: 9177d571d3507a0deb6952df5e343440c0ebf9b3cf96a47f6154bddc582a56de
font_01_sfnt_off0000ddf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF2 10424 bytes
SHA-256: eb19009d4e1e9301790f71b8caa5d91c673ae0095ce121ff8432a4337a2679a9
font_02_sfnt_off000101b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B9 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90
font_03_sfnt_off00011650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11650 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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