Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6a25aa88a55bd1…

MALICIOUS

PDF

80.0 KB Created: 2021-04-02 18:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 325b5a3e2075fc28a82699324bd6cdbb SHA-1: 3d8081a2d7204989330cf5ce97ac568df7c03c28 SHA-256: 2e6a25aa88a55bd128c7ff90e9a2d23a9a0e8338c404bd6bcfa6b27bcfd81106
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=lal+anthem+video+song', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text that appears to be a lure related to a song title.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=lal+anthem+video+song PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/Z0BgguG/himeesh_madaan_book.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/bugaxipe.pdfIn PDF document text
    • http://tijukilebag.getenjoyment.net/midi_to_mp3_converter_app.pdfIn PDF document text
    • http://muwiduvepobuz.mygamesonline.org/wosojagafanigemirax.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/buchi_rotavapor_r-_124_manual.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/tao_te_ching_book_1_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/karefesifolo/jbgcmnk/60931112609.pdfIn PDF document text
    • https://cdn.sqhk.co/tosuwukiwate/j1u3kBf/computer_launcher_pro_2019_apk_no_ads.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/tojalotibapalit.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/jbnf1ha/muvumibiteveve.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://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_247ca98fc6bd432f9c867e86e08bb893.pdf?index=trueIn PDF document text
    • https://abbf68a8-5b21-4996-91be-11266bd273ed.filesusr.com/ugd/9374a7_4242198343494baca4b6f458cb8dbd70.pdf?index=trueIn PDF document text
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_fe54897c804f48ff8e1817c358c49e67.pdf?index=trueIn PDF document text
    • http://lenofafezanobu.atwebpages.com/components_of_empirical_research_methodology.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/8884736324.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/avidemux_free_full_version_64-_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/rutovelabowiliwemoruv.pdfIn PDF document text
    • http://dimavimamanonev.rf.gd/kamafovasineramalotukuku.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_1173e7a650d34cfca41cd8a4555aa7f9.pdf?index=trueIn PDF document text
    • https://b24182fa-1fee-416c-9f57-41d8a36573e1.filesusr.com/ugd/1cc367_8bc63980ff53489495191e8cc71bd697.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 4932 bytes
SHA-256: d50017a718b5e56c5cca0b6fddf5b2b17aadbaed6e1f0e7ca0c591f83e4c34e7
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 11580 bytes
SHA-256: 09fddf4f4e1081440f4f7ea50ddfdc6d7f6034b1ba89d653305250ab814d310f
font_02_sfnt_off000124d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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