Malicious PDF — malware analysis report

Static analysis result for SHA-256 db7d23a30004f46c…

MALICIOUS

PDF

87.9 KB Created: 2021-03-02 02:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d8031033e1e136d1f1f62fdf71622bbd SHA-1: 4de5932d4f9b5cc5762d59ee780ff3ab67ee3840 SHA-256: db7d23a30004f46c37c361546f3781d7df894d34036441bed6befbb72bd5f6db
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to 'xezojetit.ru', suggesting it's designed to redirect users to a potentially malicious site. The document body's content, 'Tengu man stage', is likely a lure to entice users to click on the embedded links.

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://xezojetit.ru/wix?keyword=tengu+man+stage PDF link annotation
    • http://twirlini.com/kebizotapupijq2v0e.pdfIn PDF document text
    • http://onatural.space/joputetuvasuniiqeuj.pdfIn PDF document text
    • http://andyhong.blog/calendario_academico_ucm_ciencias_de_la_informacionmm1u6.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/vuxegutupal.pdfIn PDF document text
    • https://ropedali.weebly.com/uploads/1/3/0/9/130969406/3654790.pdfIn PDF document text
    • https://kunubukom.weebly.com/uploads/1/3/4/5/134599245/giburufema.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5fe04ca775964.pdfIn PDF document text
    • http://eu-study.ru/abap_delete_from_internal_table_performance7h0e8.pdfIn PDF document text
    • http://getne.xyz/3770731671863828.pdfIn PDF document text
    • http://kindraretterath.com/3136529235779vmf.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/know_understand_do_common_core.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/sedoxekusesukajubobi.pdfIn PDF document text
    • http://netewe8.xyz/denon_avr_2113_setup2fugt.pdfIn PDF document text
    • http://legendarycraft.ru/bekepilav9f9d.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
    • http://sabixukavizom.myartsonline.com/2_or_more_atoms_joined_together_called.pdfIn PDF document text
    • http://nizowozutagele.atwebpages.com/pcso_lotto_result_6_45_dec_16_2019.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE84 5148 bytes
SHA-256: 3104c883be9ce4ad591b4567b89e4cf05dc98a4afa9e86a9057e6560c58f1e2e
font_01_sfnt_off00011084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11084 4548 bytes
SHA-256: 352cc1c22a15b0d13bd81b23cc3da96291c3f900373bd85392ccd86522687d42
font_02_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 10532 bytes
SHA-256: 03064685dd83c496bd568d0f9504a70200b82554b941051eaa929f7d89268cd7
font_03_sfnt_off00014401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14401 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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